Marble Hall Murders

A Novel

By Anthony Horowitz

On Sale: 3/24/2026

Murder links past and present once again in this mind-boggling metafictional mystery from Anthony Horowitz—another tribute to the golden age of Agatha Christie featuring detective Atticus Pund and editor Susan Ryland, stars of the New York Times bestsellers Magpie Murders and Moonflower Murders

Editor Susan Ryeland has left her Greek island, her hotel, and her Greek boyfriend, Andreas, in search of a new life back in England.

Freelancing for Causton Books, she’s working on the manuscript of a novel, Pund’s Last Case, by a young author named Eliot Crace, a continuation of the popular Alan Conway series. Susan is surprised to learn that Eliot is the grandson of legendary children’s author Marian Crace, who died some fifteen years ago—murdered, Eliot insists, by poison.

As Susan begins to read the manuscript’s opening chapters, the skeptical editor is relieved to find that Pund’s Last Case is actually very good. Set in the South of France, it revolves around the mysterious death of Lady Margaret Chalfont, who, though mortally ill, is poisoned—perhaps by a member of her own family. But who did it? And why?

The deeper Susan reads, the more it becomes clear that the clues leading to the truth of Marian Crace’s death are hidden within this Atticus Pund mystery.

While Eliot’s accusation becomes more plausible, his behaviour grows increasingly erratic. Then he is suddenly killed in a hit-and-run accident, and Susan finds herself under police scrutiny as a suspect in his death.

Three mysterious deaths. Multiple motives and possible murderers. If Susan doesn’t solve the mystery of Pund’s Last Case, she may well be the next victim.

ISBN: 9781443469647
Imprint: Harper Perennial
On Sale: Mar 24, 2026
List price: $23.99
No of pages: 592
Trim Size:
BISAC 1: FICTION / Mystery & Detective / Amateur Sleuth
BISAC 2: FICTION / Mystery & Detective / General
BISAC 3: FICTION / General

Anthony Horowitz

Biography

Anthony Horowitz is one of the UK’s most prolific and successful writers, unique in being active in both adult and YA fiction, TV, theater, and journalism. Several of his previous novels were instant New York Times bestsellers. His bestselling Alex Rider series for young adults has sold more than nineteen million copies worldwide and has become a hugely successful show on Amazon Prime Video. His breakthrough Magpie Murders mystery series has been adapted into miniseries for PBS. He lives in London and was recently awarded the CBE for services to literature.

 

Lesley Manville

Tim McMullen

Murder links past and present once again in this mind-boggling metafictional mystery from Anthony Horowitz—another tribute to the golden age of Agatha Christie featuring detective Atticus Pund and editor Susan Ryland, stars of the New York Times bestsellers Magpie Murders and Moonflower Murders

Editor Susan Ryeland has left her Greek island, her hotel, and her Greek boyfriend, Andreas, in search of a new life back in England.

Freelancing for Causton Books, she’s working on the manuscript of a novel, Pund’s Last Case, by a young author named Eliot Crace, a continuation of the popular Alan Conway series. Susan is surprised to learn that Eliot is the grandson of legendary children’s author Marian Crace, who died some fifteen years ago—murdered, Eliot insists, by poison.

As Susan begins to read the manuscript’s opening chapters, the skeptical editor is relieved to find that Pund’s Last Case is actually very good. Set in the South of France, it revolves around the mysterious death of Lady Margaret Chalfont, who, though mortally ill, is poisoned—perhaps by a member of her own family. But who did it? And why?

The deeper Susan reads, the more it becomes clear that the clues leading to the truth of Marian Crace’s death are hidden within this Atticus Pund mystery.

While Eliot’s accusation becomes more plausible, his behaviour grows increasingly erratic. Then he is suddenly killed in a hit-and-run accident, and Susan finds herself under police scrutiny as a suspect in his death.

Three mysterious deaths. Multiple motives and possible murderers. If Susan doesn’t solve the mystery of Pund’s Last Case, she may well be the next victim.

ISBN: 9781443469647
Imprint: Harper Perennial
On Sale: Mar 24, 2026
List price: $23.99
No of pages: 592
Trim Size:
BISAC 1: FICTION / Mystery & Detective / Amateur Sleuth
BISAC 2: FICTION / Mystery & Detective / General
BISAC 3: FICTION / General

Anthony Horowitz

Biography

Anthony Horowitz is one of the UK’s most prolific and successful writers, unique in being active in both adult and YA fiction, TV, theater, and journalism. Several of his previous novels were instant New York Times bestsellers. His bestselling Alex Rider series for young adults has sold more than nineteen million copies worldwide and has become a hugely successful show on Amazon Prime Video. His breakthrough Magpie Murders mystery series has been adapted into miniseries for PBS. He lives in London and was recently awarded the CBE for services to literature.

 

Lesley Manville

Tim McMullen