Works of fiction
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. By the end of the 1930s, Christie wrote in her diary that she was finding Poirot "insufferable", and by the 1960s she felt he was "an egocentric creep". 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". Unlike Doyle, she resisted the temptation to kill her detective off while he was still popular. She married off Poirot's "Watson", Captain Arthur Hastings, in an attempt to trim her cast commitments.
Miss Jane Marple was introduced in a series of short stories that began publication in December 1927 and were subsequently collected under the title The Thirteen Problems. Marple was a genteel, elderly spinster who solved crimes using analogies to English village life. Christie said, "Miss Marple was not in any way a picture of my grandmother; she was far more fussy and spinsterish than my grandmother ever was", but her autobiography establishes a firm connection between the fictional character and Christie's step-grandmother Margaret Miller ("Auntie-Grannie") and her "Ealing cronies". Both Marple and Miller "always expected the worst of everyone and everything, and were, with almost frightening accuracy, usually proved right". Marple appeared in 12 novels and 20 stories.
During the Second World War, Christie wrote two novels, Curtain and Sleeping Murder, featuring Hercule Poirot and Miss Marple, respectively. Both books were sealed in a bank vault, and she made over the copyrights by deed of gift to her daughter and her husband to provide each with a kind of insurance policy. Christie had a heart attack and a serious fall in 1974, after which she was unable to write. Her daughter authorised the publication of Curtain in 1975, and Sleeping Murder was published posthumously in 1976. These publications followed the success of the 1974 film version of Murder on the Orient Express.
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. In a recording discovered and released in 2008, Christie revealed the reason for this: "Hercule Poirot, a complete egoist, would not like being taught his business or having suggestions made to him by an elderly spinster lady. Hercule Poirot – a professional sleuth – would not be at home at all in Miss Marple's world."
In 2013, the Christie family supported the release of a new Poirot story, The Monogram Murders, written by British author Sophie Hannah. 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.
Early in her career, a reporter noted that "her plots are possible, logical, and always new". According to Hannah, "At the start of each novel, she shows us an apparently impossible situation and we go mad wondering 'How can this be happening?'. Then, slowly, she reveals how the impossible is not only possible but the only thing that could have happened."
Christie developed her storytelling techniques during what has been called the "Golden Age" of detective fiction. Author Dilys Winn called Christie "the doyenne of Coziness", a sub-genre which "featured a small village setting, a hero with faintly aristocratic family connections, a plethora of red herrings and a tendency to commit homicide with sterling silver letter openers and poisons imported from Paraguay". 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 villages – the 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. Stereotyped characters abound (the femme fatale, the stolid policeman, the devoted servant, the dull colonel), but these may be subverted to stymie the reader; impersonations and secret alliances are always possible. There is always a motive – most often, money: "There are very few killers in Christie who enjoy murder for its own sake."
Professor of Pharmacology Michael C. Gerald noted that "in over half her novels, one or more victims are poisoned, albeit not always to the full satisfaction of the perpetrator." 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.
According to crime writer P. D. James, Christie was prone to making the unlikeliest character the guilty party. Alert readers could sometimes identify the culprit by identifying the least likely suspect. 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. Much of the work, particularly dialogue, was done in her head before she put it on paper.
In 2013, the 600 members of the Crime Writers' Association chose The Murder of Roger Ackroyd as "the best whodunit ... ever written". 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. It begins with the classic set-up of potential victim(s) and killer(s) isolated from the outside world, but then violates conventions. There is no detective involved in the action, no interviews of suspects, no careful search for clues, and no suspects gathered together in the last chapter to be confronted with the solution. As Christie herself said, "Ten people had to die without it becoming ridiculous or the murderer being obvious." Critics agreed she had succeeded: "The arrogant Mrs. Christie this time set herself a fearsome test of her own ingenuity ... the reviews, not surprisingly, were without exception wildly adulatory."
Christie included stereotyped descriptions of characters in her work, especially before 1945 (when such attitudes were more commonly expressed publicly), particularly in regard to Italians, Jews, and non-Europeans. For example, she described "men of Hebraic extraction, sallow men with hooked noses, wearing rather flamboyant jewellery" in the short story "The Soul of the Croupier" from the collection The Mysterious Mr Quin. In 1947, the Anti-Defamation League in the US sent an official letter of complaint to Christie's American publishers, Dodd, Mead and Company, regarding perceived antisemitism in her works. Christie's British literary agent later wrote to her US representative, authorising American publishers to "omit the word 'Jew' when it refers to an unpleasant character in future books."
In The Hollow, published in 1946, one of the characters is described by another as "a Whitechapel Jewess with dyed hair and a voice like a corncrake ... a small woman with a thick nose, henna red hair and a disagreeable voice". To contrast with the more stereotyped descriptions, Christie portrayed some foreign characters as victims, or potential victims, at the hands of English malefactors, such as, respectively, Olga Seminoff (Hallowe'en Party) and Katrina Reiger (in the short story "How Does Your Garden Grow?"). Jewish characters are often seen as un-English (such as Oliver Manders in Three Act Tragedy), but they are rarely the culprits.
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.
In addition to Hercule Poirot and Miss Marple, Christie also created amateur detectives Thomas (Tommy) Beresford and his wife, Prudence "Tuppence" Beresford (née Cowley), who appear in four novels and one collection of short stories published between 1922 and 1974. Unlike her other sleuths, the Beresfords were only in their early twenties when introduced in The Secret Adversary, and were allowed to age alongside their creator. She treated their stories with a lighter touch, giving them a "dash and verve" which was not universally admired by critics. Their last adventure, Postern of Fate, was Christie's last novel.
Harley Quin was "easily the most unorthodox" of Christie's fictional detectives. Inspired by Christie's affection for the figures from the Harlequinade, the semi-supernatural Quin always works with an elderly, conventional man called Satterthwaite. The pair appear in 14 short stories, 12 of which were collected in 1930 as The Mysterious Mr Quin. Mallowan described these tales as "detection in a fanciful vein, touching on the fairy story, a natural product of Agatha's peculiar imagination". Satterthwaite also appears in a novel, Three Act Tragedy, and a short story, "Dead Man's Mirror", both of which feature Poirot.
Another of her lesser-known characters is Parker Pyne, a retired civil servant who assists unhappy people in an unconventional manner. The 12 short stories which introduced him, Parker Pyne Investigates (1934), are best remembered for "The Case of the Discontented Soldier", which features Ariadne Oliver, "an amusing and satirical self-portrait of Agatha Christie". Over the ensuing decades, Oliver reappeared in seven novels. In most of them she assists Poirot.
In 1928, Michael Morton adapted The Murder of Roger Ackroyd for the stage under the name of Alibi. The play enjoyed a respectable run, but Christie disliked the changes made to her work and, in future, preferred to write for the theatre herself. The first of her own stage works was Black Coffee, which received good reviews when it opened in the West End in late 1930. 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.
In the 1950s, "the theatre ... engaged much of Agatha's attention." 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. Her expectations for the play were not high; she believed it would run no more than eight months. The Mousetrap has long since made theatrical history as the world's longest-running play, staging its 27,500th performance in September 2018. 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. Spider's Web, an original work written for actress Margaret Lockwood at her request, premiered in the West End in 1954 and was also a hit. Christie became the first female playwright to have three plays running simultaneously in London: The Mousetrap, Witness for the Prosecution and Spider's Web. 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." In a letter to her daughter, Christie said being a playwright was "a lot of fun!"
Christie published six mainstream novels under the name Mary Westmacott, a pseudonym which gave her the freedom to explore "her most private and precious imaginative garden". These books typically received better reviews than her detective and thriller fiction. Of the first, Giant's Bread published in 1930, a reviewer for The New York Times wrote, "... her book is far above the average of current fiction, in fact, comes well under the classification of a 'good book'. And it is only a satisfying novel that can claim that appellation."
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.
The other Westmacott titles are: Unfinished Portrait (1934), Absent in the Spring (1944), The Rose and the Yew Tree (1948), A Daughter's a Daughter (1952), and The Burden (1956).
