On the data. One page rather than four, because the detectives share a world and the adaptations move between them freely. Christie published sixty-six detective novels and, depending on which count you take, fourteen or fifteen short story collections. All sixty-six novels are listed here: thirty-three Poirot, twelve Marple, four Tommy and Tuppence, and seventeen with no series detective. The collections are not listed at all, and that is the main omission. It is deliberate. The short stories were assembled into completely different books in Britain and America, so the same story turns up in The Labours of Hercules in one country and in a differently named volume in the other, several United States collections have no United Kingdom equivalent, and a title on a shelf is not a reliable guide to what is inside it. Listing them without checking every table of contents against both editions would produce a list that looks authoritative and is not. Partners in Crime is the one exception: it is a collection, and it is here because Tommy and Tuppence age across their five books and it sits between the first and the second. Also left out: the six Mary Westmacott novels, which are not crime fiction; the Parker Pyne and Harley Quin books, which are collections; the plays, including The Mousetrap and the original stage version of Witness for the Prosecution; and the continuation novels written after Christie's death by Sophie Hannah. On order. Christie wrote contemporary novels, so for almost every book the year it was published is also roughly the year it happens. That is why story order on this page reads as a publication timeline. The exceptions are what matter. Death Comes as the End is set in Egypt around 2000 BC and is the only book placed outside the run. Curtain was written in the early 1940s, when Christie thought she might not survive the war, and was kept in a bank vault for thirty years before publication in 1975; it kills off Poirot and returns to Styles, the house from his first case, so it belongs last in reading order even though it was written near the middle. Sleeping Murder was written and stored the same way and published in 1976 as Marple's last case. Read both at the end, not at the point in the timeline where they were written. Five Little Pigs opens on a murder sixteen years old, and A Caribbean Mystery must be read before Nemesis, which follows on from it directly. Several books put more than one of her detectives in the same room. Cards on the Table has Poirot, Superintendent Battle, Colonel Race and the novelist Ariadne Oliver all four at once. Race also appears in The Man in the Brown Suit, Death on the Nile and Sparkling Cyanide, which is why two of those sit in the standalone group and two in the Poirot group. Battle runs from The Secret of Chimneys through The Seven Dials Mystery, Cards on the Table and Murder Is Easy to Towards Zero, again across two groups. Ariadne Oliver appears with Poirot six times and once without him, in The Pale Horse. Titles differ between countries more than any other author of her rank, so the United Kingdom first-edition title is used throughout and the American alternative is noted on the item. On screen. ITV's Agatha Christie's Poirot ran seventy episodes across thirteen series from 1989 to 2013 with David Suchet, and is the only production to adapt every Poirot novel. ITV's Marple ran twenty-three feature-length films across six series from 2004 to 2013, with Geraldine McEwan for the first three series and Julia McKenzie for the last three; several of them put Marple into books she does not appear in, which is worth knowing before using them as a guide to the novels. Episode counts for both are firm. The series years are not: individual series were broadcast across a New Year, sources give different years for the same series, and the figures here are the year each series opened on ITV. Both are flagged unconfirmed for that reason. Kenneth Branagh has made three films as Poirot and no fourth has been confirmed, so none is listed. Sarah Phelps wrote five one-off adaptations for BBC One between 2015 and 2020, all of which change endings, motives or characters, and the two most recent BBC films and the Netflix Seven Dials continue that. Why Didn't They Ask Evans? is listed at three parts, which is what BritBox released and what the episode guides show; one reference work says four, and the site uses three. Tommy & Tuppence is due on BritBox on 15 September 2026 and is listed unreleased. A new BBC and BritBox Poirot series titled Hercule, with Edward Bluemel, was announced in June 2026 with no episode count and no date, so it is not listed. The earlier screen versions are also not here: the Margaret Rutherford films of the 1960s, the Joan Hickson BBC Miss Marple series of 1984 to 1992, the Peter Ustinov and Albert Finney films, and the Japanese and French series.

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