Agatha Christie

Dame Agatha Mary Clarissa Mallowan, Lady Mallowan (, 15 September 1890 – 12 January 1976), usually known by her first married name, Agatha Christie, was an English author known for her 66 detective novels and 14 short-story collections, particularly those revolving around fictional detectives Hercule Poirot (with the novel debut being The Mysterious Affair at Styles in 1920), Tommy and Tuppence (with the novel debut being The Secret Adversary in 1922), and Miss Marple (with the novel debut being The Murder at the Vicarage in 1930). She is widely regarded as one of the greatest writers, particularly in the mystery genre.

A writer during the "Golden Age of Detective Fiction", Christie has been called the "Queen of Crime"—a nickname now trademarked by her estate—or the "Queen of Mystery".

Christie was born into a wealthy upper-middle-class family in Torquay, Devon, and was largely home-schooled. She was initially an unsuccessful writer with six consecutive rejections, but this changed in 1920, when The Mysterious Affair at Styles, featuring detective Hercule Poirot, was published. Her first husband was Archibald Christie; they married in 1914 and had one child before divorcing in 1928. Following the breakdown of her marriage and the death of her mother in 1926, she made international headlines by going missing for 11 days. During both world wars, she served in hospital dispensaries, acquiring a thorough knowledge of the poisons that featured in many of her novels, short stories, and plays. Following her marriage to archaeologist Max Mallowan in 1930, she spent several months each year on archaeological excavations in the Middle East and used her first-hand knowledge of this profession in her fiction.

According to UNESCO's Index Translationum, she remains the most-translated individual author. Her novel And Then There Were None is one of the top-selling books of all time, with about 100 million copies sold. Christie's stage play The Mousetrap holds the world record for the longest initial run. It opened at the Ambassadors Theatre in the West End on 25 November 1952, and by 2018, more than 27,500 performances had been given. The play was temporarily closed in 2020 because of COVID-19 lockdowns in London before it reopened in 2021. In 1955, Christie was the first recipient of the Mystery Writers of America's Grand Master Award. Later that year, Witness for the Prosecution received an Edgar Award for best play. In 2013, she was voted the best crime writer and The Murder of Roger Ackroyd the best crime novel ever by 600 professional novelists of the Crime Writers' Association. In 2015, And Then There Were None was named the "World's Favourite Christie" in a vote sponsored by the author's estate. Many of Christie's books and short stories have been adapted for television, radio, video games, and graphic novels. More than 30 feature films are based on her work.

Life and career 1890–1907: childhood and adolescence

Agatha Mary Clarissa Miller was born on 15 September 1890, into a wealthy upper middle-class family in Torquay, Devon. She was the youngest of three children born to Frederick Alvah Miller, "a gentleman of substance", and his wife Clarissa "Clara" Margaret (née Boehmer).

Christie's mother Clara was born in Dublin in 1854Refn|Most biographers give Christie's mother's place of birth as Belfast but do not provide sources. Current primary evidence, including census entries (place of birth Dublin), her baptism record (Dublin), and her father's service record and regimental history (when her father was in Dublin), indicates she was almost certainly born in Dublin in the first quarter of 1854. and his wife Mary Ann (née West). Boehmer died in Jersey in 1863,Refn|Boehmer's death registration states he died at age 49 from bronchitis after retiring from the army, To assist Mary financially, Margaret and Nathaniel agreed to foster nine-year-old Clara; the family settled in Timperley, Cheshire. The couple had no children together, but Nathaniel had a 17-year-old son, Frederick "Fred", from his previous marriage. Fred was born in New York City and travelled extensively after leaving his Swiss boarding school. The second, Louis Montant "Monty", was born in Morristown, New Jersey, in 1880, while the family was on an extended visit to the United States.

When Fred's father died in 1869, he left Clara £2,000 (approximately ); in 1881, they used this to buy the leasehold of a villa in Torquay named Ashfield. Here, their third and last child, Agatha, was born in 1890.

By 1901, her father's health had deteriorated, because of what he believed were heart problems. Christie later said that her father's death when she was 11 marked the end of her childhood. Other stories followed, most of them illustrating her interest in spiritualism and the paranormal. These included "The Call of Wings" and "The Little Lonely God". Magazines rejected all her early submissions, made under pseudonyms (including Mac Miller, Nathaniel Miller, and Sydney West); some submissions were later revised and published under her real name, often with new titles. Clara suggested that her daughter ask for advice from the successful novelist Eden Phillpotts, a family friend and neighbour, who responded to her enquiry, encouraged her writing, and sent her an introduction to his own literary agent, Hughes Massie, who also rejected Snow Upon the Desert, but suggested a second novel. The couple quickly fell in love. Three months after their first meeting, Archie proposed marriage, and Agatha accepted. Rising through the ranks, he was posted back to Britain in September 1918 as a colonel in the Air Ministry. Christie involved herself in the war effort as a member of the Voluntary Aid Detachment of the British Red Cross. From October 1914 to May 1915, then from June 1916 to September 1918, she worked 3,400 hours in the Town Hall Red Cross Hospital, Torquay, first as a Voluntary Aid Detachment nurse (unpaid) then as a dispenser at £16 (approximately ) a year from 1917 after qualifying as an apothecary's assistant. Her war service ended in September 1918 when Archie was reassigned to London, and they rented a flat in St. John's Wood. who had taken refuge in Britain after Germany invaded Belgium. Christie's inspiration for the character came from Belgian refugees living in Torquay and the Belgian soldiers she helped to treat as a volunteer nurse during the First World War. Her original manuscript was rejected by Hodder & Stoughton and Methuen. After keeping the submission for several months, John Lane at The Bodley Head offered to accept it, provided that Christie change how the solution was revealed. She did so, and signed a contract committing her next five books to The Bodley Head, which she later felt was exploitative. They learned to surf prone in South Africa; then, in Waikiki, they were among the first Britons to surf standing up, and extended their time there by three months to practise. She is remembered at the Museum of British Surfing as having said about surfing, "Oh it was heaven! Nothing like rushing through the water at what seems to you a speed of about two hundred miles an hour. It is one of the most perfect physical pleasures I have known."

When they returned to England, Archie resumed work in the city, and Christie continued to work hard at her writing. After living in a series of apartments in London, they bought a house in Sunningdale, Berkshire, which they renamed Styles after the mansion in Christie's first detective novel.

1926: Disappearance

In August 1926, Archie asked Christie for a divorce. He had fallen in love with Nancy Neele, a friend of Major Belcher's. unaccompanied by his wife. Late that evening, Christie disappeared from their home in Sunningdale. The following morning, her car, a Morris Cowley, was discovered at Newlands Corner in Surrey, parked above a chalk quarry with an expired driving licence and clothes inside. It was feared that she might have drowned herself in the Silent Pool, a nearby beauty spot.

The disappearance quickly became a news story. The press sought to satisfy their readers' "hunger for sensation, disaster, and scandal". Sir Arthur Conan Doyle gave a spirit medium one of Christie's gloves to find her.Refn|Dorothy L. Sayers, who visited the "scene of the disappearance", later incorporated details in her book Unnatural Death. Despite the extensive manhunt, she was not found for another 10 days. On 4 December, the day after she went missing, it is now known she had tea in London and visited Harrods department store where she marvelled at the spectacle of the store's Christmas display. On 14 December 1926, she was located at the Swan Hydropathic Hotel in Harrogate, Yorkshire, north of her home in Sunningdale, registered as "Mrs TressaRefn|A classified advertisement placed by Archie Christie in The Times (11 December 1926, p.1) ("Teresa Neele. Will any friend, relative, or nurse who was with Miss Teresa Neele, lately of Capetown, at any time during the past two years, and who can give any information as to her movements or present whereabouts, please communicate with Colonel Christie, 12, Stanhope-place, W.2.") gives the first name as Teresa, but her hotel register signature more naturally reads Tressa; newspapers reported that Christie used Tressa on other occasions during her disappearance (including joining a library). The next day, Christie left for her sister's residence at Abney Hall, Cheadle, where she was sequestered "in guarded hall, gates locked, telephone cut off, and callers turned away".

Christie's autobiography makes no reference to the disappearance. yet opinion remains divided over the reason for her disappearance. Some, including her biographer Morgan, believe she disappeared during a fugue state. The author Jared Cade concluded that Christie planned the event to embarrass her husband but did not anticipate the resulting public melodrama. Christie's biographer Laura Thompson provides an alternative view that Christie disappeared during a nervous breakdown, conscious of her actions but not in emotional control of herself. Refn|group=lower-alpha|Christie hinted at a nervous breakdown, saying to a woman with similar symptoms, "I think you had better be very careful; it is probably the beginning of a nervous breakdown." returning three months later. Refn|Christie's authorised biographer includes an account of specialist psychiatric treatment following Christie's disappearance, but the information was obtained second or third hand after her death. Christie retained custody of their daughter, Rosalind, and kept the Christie surname for her writing. Reflecting on the period in her autobiography, Christie wrote, "So, after illness, came sorrow, despair and heartbreak. There is no need to dwell on it." Christie and Mallowan married in Edinburgh in September 1930. Their marriage lasted until Christie's death in 1976. She accompanied Mallowan on his archaeological expeditions, and her travels with him contributed background to several of her novels set in the Middle East. Refn|Other authors claim Christie wrote Murder on the Orient Express whilst at a dig at Arpachiyah. This was their main residence for the rest of their lives and the place where Christie did much of her writing.

The couple acquired the Greenway Estate in Devon as a summer residence in 1938; Christie frequently stayed at Abney Hall, Cheshire, which was owned by her brother-in-law, James Watts, and based at least two stories there: a short story, "The Adventure of the Christmas Pudding", in the story collection of the same name and the novel After the Funeral.

During World War II, Christie moved to London and lived in a flat at the Isokon in Hampstead from 1941 to 1947, while working in the pharmacy at University College Hospital (UCH), London, where she updated her knowledge of poisons. Her later novel The Pale Horse was based on a suggestion from Harold Davis, the chief pharmacist at UCH. In 1977, a thallium poisoning case was solved by British medical personnel who had read Christie's book and recognised the symptoms she described.

The British intelligence agency MI5 investigated Christie after a character called Major Bletchley appeared in her 1941 thriller N or M?, which was about a hunt for a pair of deadly fifth columnists in wartime England. MI5 was concerned that Christie had a spy in Britain's top-secret codebreaking centre, Bletchley Park. The agency's fears were allayed when Christie told her friend, the codebreaker Dilly Knox, "I was stuck there on my way by train from Oxford to London and took revenge by giving the name to one of my least lovable characters." She was co-president of the Detection Club from 1958 to her death in 1976. three years after her husband had been knighted for his archaeological work. After her husband's knighthood, Christie could also be styled Lady Mallowan.

Personal qualities In 1946, Christie said of herself: "My chief dislikes are crowds, loud noises, gramophones and cinemas. I dislike the taste of alcohol and do not like smoking. I do like sun, sea, flowers, travelling, strange foods, sports, concerts, theatres, pianos, and doing embroidery."

Christie was a lifelong, "quietly devout" and shortly after Christie's death a charitable memorial fund was set up to "help two causes that she favoured: old people and young children".

Christie's obituary in The Times notes that "she never cared much for the cinema, or for wireless and television." Further, Dame Agatha's private pleasures were gardeningshe won local prizes for horticultureand buying furniture for her various houses. She was a shy person: she disliked public appearances, but she was friendly and sharp-witted to meet. By inclination as well as breeding, she belonged to the English upper middle class. She wrote about, and for, people like herself. That was an essential part of her charm. Upon her death, two West End theatresthe St. Martin's, where The Mousetrap was playing, and the Savoy, which was home to a revival of Murder at the Vicaragedimmed their outside lights in her honour.

Mallowan, who remarried in 1977, died in 1978 and was buried next to Christie.

Estate and subsequent ownership of works

Christie was unhappy about becoming "an employed wage slave", Agatha Christie Limited still owns the worldwide rights for more than 80 of Christie's novels and short stories, 19 plays, and nearly 40 TV films. One estimate of her total earnings from more than a half-century of writing is $20 million (approximately $ million in ). As a result of her tax planning, her will left only £106,683 (approximately ) net, which went mostly to her husband and daughter along with some smaller bequests. Her remaining 36% share of Agatha Christie Limited was inherited by Hicks, who preserved her mother's works, image, and legacy until her own death 28 years later.

Greenway in Devon, Christie's summer home, was used as a setting for some of her plots, including Dead Man's Folly. The final episode of Agatha Christie's Poirot was filmed at the estate in 2013.

In 2004, Hicks' obituary in The Telegraph noted that she had been "determined to remain true to her mother's vision and to protect the integrity of her creations" and disapproved of "merchandising" activities.

Christie's family and family trusts, including great-grandson James Prichard, continue to own the 36% stake in Agatha Christie Limited, and remain associated with the company. In 2020, James Prichard was the company's chairman. Mathew Prichard also holds the copyright to some of his grandmother's later works including The Mousetrap.

In 1998, Booker sold its shares in Agatha Christie Limited (at the time earning £2,100,000, approximately annual revenue) for £10,000,000 (approximately ) to Chorion, whose portfolio of authors' works included the literary estates of Enid Blyton and Dennis Wheatley.

In 2014, the BBC acquired exclusive TV rights to Christie's works in the UK (previously associated with ITV) and made plans with Acorn's co-operation to air new productions for the 125th anniversary of Christie's birth in 2015. Since then the BBC has broadcast Partners in Crime, And Then There Were None, The Witness for the Prosecution, Ordeal by Innocence, The A.B.C. Murders, The Pale Horse, Murder Is Easy and Towards Zero. A version of Endless Night has been announced.

Since 2020, reissues of Christie's Miss Marple and Hercule Poirot novels by HarperCollins have removed "passages containing descriptions, insults or references to ethnicity".

On 1 January 2026, several of Christie's landmark 1930 publications entered the public domain in the United States. This includes the first Miss Marple novel The Murder at the Vicarage and her debut stage play Black Coffee. Under the U.S. Copyright Term Extension Act, these works became freely available for publication and adaptation 95 years after their initial release, following the earlier expiration of copyrights for The Mysterious Affair at Styles and The Murder of Roger Ackroyd.

In jurisdictions with copyright terms of life of the author plus 50 years all of Christie's published works will come out of copyright at the start of 2027, whereas in those places with life of the author plus 70 years terms they will remain copyrighted until the start of 2047.

Works

Works of fiction Hercule Poirot and Miss Marple

alt=Drawing of a gentleman in a dinner suit twirling his large moustache, illustrating the Christie story "13 for Dinner"

Christie's first published book, The Mysterious Affair at Styles, was released in 1920 and introduced the detective Hercule Poirot, who appeared in 33 of her novels and more than 50 short stories.

Over the years, Christie grew tired of Poirot, much as Doyle did with Sherlock Holmes. Thompson believes Christie's occasional antipathy to her creation is overstated, and points out that "in later life she sought to protect him against misrepresentation as powerfully as if he were her own flesh and blood". Both Marple and Miller "always expected the worst of everyone and everything, and were, with almost frightening accuracy, usually proved right".

Shortly before the publication of Curtain, Poirot became the first fictional character to have an obituary in The New York Times, which was printed on page one on 6 August 1975.

Christie never wrote a novel or short story featuring both Poirot and Miss Marple. Hannah later published several more Poirot mysteries, Closed Casket in 2016, The Mystery of Three Quarters in 2018. The Killings at Kingfisher Hill in 2020, Hercule Poirot's Silent Night in 2023 with a sixth instalment being commissioned in 2024.

In 2021, following the success of Sophie Hannah's outings with Poirot, the Christie family supported the release of a collection of Miss Marple short stories. Called Marple, the collection was released in 2022 and each story was written by a different author. This included Naomi Alderman, Leigh Bardugo, Alyssa Cole, Lucy Foley, Elly Griffiths, Natalie Haynes, Jean Kwok, Val McDermid, Karen M. McManus, Dreda Say Mitchell, Kate Mosse and Ruth Ware.

Formula and plot devices Early in her career, a reporter noted that "her plots are possible, logical, and always new". At the end, in a Christie hallmark, the detective usually gathers the surviving suspects into one room, explains the course of their deductive reasoning, and reveals the guilty party; but there are exceptions where it is left to the guilty party to explain all (such as And Then There Were None and Endless Night).

Christie did not limit herself to quaint English villagesthe action might take place on a small island (And Then There Were None), an aeroplane (Death in the Clouds), a train (Murder on the Orient Express), a steamship (Death on the Nile), a smart London flat (Cards on the Table), a resort in the West Indies (A Caribbean Mystery), or an archaeological dig (Murder in Mesopotamia)but the circle of potential suspects is usually closed and intimate: family members, friends, servants, business associates, fellow travellers. There is always a motivemost often, money: "There are very few killers in Christie who enjoy murder for its own sake." Guns, knives, garrottes, tripwires, blunt instruments, and even a hatchet were also used, but "Christie never resorted to elaborate mechanical or scientific means to explain her ingenuity," according to John Curran, author and literary adviser to the Christie estate. Many of her clues are mundane objects: a calendar, a coffee cup, wax flowers, a beer bottle, a fireplace used during a heat wave. Christie mocked this insight in her foreword to Cards on the Table: "Spot the person least likely to have committed the crime and in nine times out of ten your task is finished. Since I do not want my faithful readers to fling away this book in disgust, I prefer to warn them beforehand that this is not that kind of book."

On BBC Radio 4's Desert Island Discs in 2007, Brian Aldiss said Christie had told him she wrote her books up to the last chapter, then decided who the most unlikely suspect was, after which she would go back and make the necessary changes to "frame" that person. Based upon a study of her working notebooks, Curran describes how Christie would first create a cast of characters, choose a setting, and then produce a list of scenes in which specific clues would be revealed; the order of scenes would be revised as she developed her plot. Of necessity, the murderer had to be known to the author before the sequence could be finalised and she began to type or dictate the first draft of her novel. Author Julian Symons observed, "In an obvious sense, the book fits within the conventions... The setting is a village deep within the English countryside, Roger Ackroyd dies in his study; there is a butler who behaves suspiciously... Every successful detective story in this period involved a deceit practised upon the reader, and here the trick is the highly original one of making the murderer the local doctor, who tells the story and acts as Poirot's Watson." Critic Sutherland Scott stated, "If Agatha Christie had made no other contribution to the literature of detective fiction she would still deserve our grateful thanks" for writing this novel.

In September 2015, to mark her 125th birthday, And Then There Were None was named the "World's Favourite Christie" in a vote sponsored by the author's estate. The novel is emblematic of both her use of formula and her willingness to discard it. "And Then There Were None carries the 'closed society' type of murder mystery to extreme lengths," according to author Charles Osborne.

In 2023, the Telegraph reported that several Agatha Christie novels have been edited to remove "passages containing descriptions, insults or references to ethnicity". Poirot and Miss Marple mysteries written between 1920 and 1976 have had passages reworked or removed in new editions published by HarperCollins, in order to strip them of language and descriptions that modern audiences find offensive, especially those involving the characters Christie's protagonists encounter outside the UK. Sensitivity readers had made the edits, which were evident in digital versions of the new editions, including the entire Miss Marple run and selected Poirot novels set to be released or that have been released since 2020. Mallowan described these tales as "detection in a fanciful vein, touching on the fairy story, a natural product of Agatha's peculiar imagination". She followed this up with adaptations of her detective novels: And Then There Were None in 1943, Appointment with Death in 1945, and The Hollow in 1951. She next adapted her short radio play into The Mousetrap, which premiered in the West End in 1952, produced by Peter Saunders and starring Richard Attenborough as the original Detective Sergeant Trotter. The play temporarily closed in March 2020, when all UK theatres shut due to the coronavirus pandemic, before it re-opened on 17 May 2021.

In 1953, she followed this with Witness for the Prosecution, whose Broadway production won the New York Drama Critics' Circle award for best foreign play of 1954 and earned Christie an Edgar Award from the Mystery Writers of America. She said, "Plays are much easier to write than books, because you can see them in your mind's eye, you are not hampered by all that description which clogs you so terribly in a book and stops you from getting on with what's happening."

It was publicized from the very beginning that "Mary Westmacott" was a pen name of a well-known author, although the identity behind the pen name was kept secret; the dust jacket of Giant's Bread mentions that the author had previously written "under her real name...half a dozen books that have each passed the thirty thousand mark in sales." (In fact, though this was technically true, it disguised Christie's identity through understatement. By the publication of Giant's Bread, Christie had published 10 novels and two short story collections, every one of which had sold considerably more than 30,000 copies.) After Christie's authorship of the first four Westmacott novels was revealed by a journalist in 1949, she wrote two more, the last in 1956.

Titles

Many of Christie's works from 1940 onward have titles drawn from literature, with the original context of the title typically printed as an epigraph.

The inspirations for some of Christie's titles include: William Shakespeare's works: Sad Cypress, By the Pricking of My Thumbs, Taken at the Flood, Absent in the Spring, and The Mousetrap, for example. Osborne notes that "Shakespeare is the writer most quoted in the works of Agatha Christie"; One, Two, Buckle My Shoe (from "One, Two, Buckle My Shoe"), Five Little Pigs (from "This Little Piggy"), Crooked House (from "There Was a Crooked Man"), A Pocket Full of Rye (from "Sing a Song of Sixpence"), Hickory Dickory Dock (from "Hickory Dickory Dock"), and Three Blind Mice (from "Three Blind Mice"). In 1955, she became the first recipient of the Mystery Writers of America's Grand Master Award. In 2008, The Times named Christie the third greatest crime writer of all time after Patricia Highsmith and Georges Simenon. In 2013, she was voted "best crime writer" in a survey of 600 members of the Crime Writers' Association of professional novelists. However, the writer Raymond Chandler criticised the artificiality of her books, as did writer Julian Symons.

In 2011, Christie was named by the digital crime drama TV channel Alibi as the second most financially successful crime writer of all time in the United Kingdom, after James Bond author Ian Fleming, with total earnings around £100 million. In 2012, Christie was among the people selected by the artist Peter Blake to appear in a new version of his most famous work, the Beatles' Sgt. Pepper's Lonely Hearts Club Band album cover, "to celebrate the British cultural figures he most admires". On the record-breaking longevity of Christie's The Mousetrap which had marked its 60th anniversary in 2012, Stephen Moss in The Guardian wrote, "the play and its author are the stars".

Book sales In her prime, Christie was rarely out of the bestseller list. She was the first crime writer to have 100,000 copies of 10 of her titles published by Penguin on the same day in 1948. , Guinness World Records listed Christie as the best-selling fiction writer of all time. Half the sales are of English-language editions, and half are translations. According to Index Translationum, , she was the most-translated individual author.

Christie is one of the most-borrowed authors in UK libraries. She is also the UK's best-selling spoken-book author. In 2002, 117,696 Christie audiobooks were sold, in comparison to 97,755 for J. K. Rowling, 78,770 for Roald Dahl and 75,841 for J. R. R. Tolkien. In 2015, the Christie estate claimed And Then There Were None was "the best-selling crime novel of all time", with approximately 100 million sales, also making it one of the highest-selling books of all time. More than two million copies of her books were sold in English in 2020.

Legacy

In 2016, the Royal Mail marked the centenary of Christie's first detective story by issuing six first-class postage stamps of her works: The Mysterious Affair at Styles, The Murder of Roger Ackroyd, Murder on the Orient Express, And Then There Were None, The Body in the Library, and A Murder is Announced. The Guardian reported that, "Each design incorporates microtext, UV ink and thermochromic ink. These concealed clues can be revealed using either a magnifying glass, UV light or body heat and provide pointers to the mysteries' solutions."

Her characters and her face appeared on the stamps of many countries like Dominica and the Somali Republic. In 2020, Christie was commemorated on a £2 coin by the Royal Mint for the first time to mark the centenary of her first novel, The Mysterious Affair at Styles.

In 2023 a life-size bronze statue of Christie sitting on a park bench holding a book was unveiled in Wallingford, Oxfordshire.

Adaptations

Christie's works have been adapted for cinema and television. The first was the 1928 British film The Passing of Mr. Quin. Poirot's first film appearance was in 1931 in Alibi, which starred Austin Trevor as Christie's sleuth. Margaret Rutherford played Marple in a series of films released in the 1960s. Christie liked her acting, but considered the first film "pretty poor" and thought no better of the rest. Branagh has since directed two more adaptations of Christie, Death on the Nile (2022) and its sequel A Haunting in Venice (2023), the latter an adaptation of her 1969 novel Hallowe'en Party.

The television adaptation Agatha Christie's Poirot (1989–2013), with David Suchet in the title role, ran for 70 episodes over 13 series. It received nine BAFTA award nominations and won four BAFTA awards in 1990–1992. The television series Miss Marple (1984–1992), with Joan Hickson as "the BBC's peerless Miss Marple", adapted all 12 Marple novels.

Christie's books have also been adapted for BBC Radio, a video game series, and graphic novels.

Interests and influences Pharmacology

During the First World War, Christie took a break from nursing to train for the Apothecaries Hall Examination. With her expert knowledge, Christie had no need of poisons unknown to science, which were forbidden under Ronald Knox's "Ten Rules for Detective Fiction".

For the 1931 digging season at Nineveh, Christie bought a writing table to continue her own work; in the early 1950s, she paid to add a small writing room to the team's house at Nimrud.

After the Second World War, Christie chronicled her time in Syria in Come, Tell Me How You Live, which she described as "small beera very little book, full of everyday doings and happenings". From 8November 2001 to March 2002, The British Museum presented a "colourful and episodic exhibition" called Agatha Christie and Archaeology: Mystery in Mesopotamia which illustrated how her activities as a writer and as the wife of an archaeologist intertwined.

In popular culture Some of Christie's fictional portrayals have explored and offered accounts of her disappearance in 1926. The film Agatha (1979), with Vanessa Redgrave, has Christie sneaking away to plan revenge against her husband; Christie's heirs sued unsuccessfully to prevent the film's distribution. The Doctor Who episode "The Unicorn and the Wasp" (17 May 2008) stars Fenella Woolgar as Christie, and explains her disappearance as being connected to aliens. The film Agatha and the Truth of Murder (2018) sends her undercover to solve the murder of Florence Nightingale's goddaughter, Florence Nightingale Shore. A fictionalised account of Christie's disappearance is also the central theme of a Korean musical, Agatha. The Christie Affair, a Christie-like mystery story of love and revenge by author Nina de Gramont, was a 2022 novel loosely based on Christie's disappearance.

Other portrayals, such as the Hungarian film Kojak Budapesten (1980), create their own scenarios involving Christie's criminal skills. In the TV play Murder by the Book (1986), Christie (Dame Peggy Ashcroft) murders one of her fictional-turned-real characters, Poirot. Christie features as a character in Gaylord Larsen's Dorothy and Agatha and The London Blitz Murders by Max Allan Collins. The American television program Unsolved Mysteries devoted a segment to her famous disappearance, with Agatha portrayed by actress Tessa Pritchard. A young Agatha is depicted in the Spanish historical television series Gran Hotel (2011) in which she finds inspiration to write her new novel while aiding local detectives. In the alternative history television film Agatha and the Curse of Ishtar (2018), Christie becomes involved in a murder case at an archaeological dig in Iraq. In 2019, Honeysuckle Weeks portrayed Christie in "No Friends Like Old Friends" (September 16, 2019), episode 1 of season 3 of the Canadian television period detective series Frankie Drake Mysteries when Christie helps visiting private detective Frankie Drake solve the disappearance and poisoning of an old friend.

In 2020, Heather Terrell, under the pseudonym of Marie Benedict, published The Mystery of Mrs. Christie, a fictional reconstruction of Christie's December 1926 disappearance. The novel was on the USA Today and The New York Times Best Seller lists. In December 2020, Library Reads named Terrell a Hall of Fame author for the book. Andrew Wilson has written four novels featuring Agatha Christie as a detective: A Talent For Murder (2017), A Different Kind of Evil (2018), Death In A Desert Land (2019) and I Saw Him Die (2020). Starting in 2021, Colleen Gleason wrote the Phyllida Bright Mysteries historical amateur sleuth series under the pen name "Colleen Cambridge"; the titular sleuth of the stories is the leading housekeeper of Christie's staff, while Christie makes continued appearances in the series. Christie was portrayed by Shirley Henderson in the 2022 comedy/mystery film See How They Run. In 2024, Mithu Sanyal published the postcolonial-theory-cum-time-travel-novel Antichristie (in German) ; part of the plot revolves around a film script seminar aiming at producing a sanitized version of the Hercule Poirot mysteries.