Marble Hall Murders: Lesley Manville Returns as Susan Ryeland in the Thrilling Finale of Anthony Horowitz’s Metafictional Mystery Trilogy

Lesley Manville makes a compelling and highly anticipated return as the sharp-witted editor-turned-sleuth Susan Ryeland in Marble Hall Murders, the gripping conclusion to Anthony Horowitz’s acclaimed Susan Ryeland series. This third installment, published in 2025, delivers a masterful blend of classic whodunnit elements with contemporary twists, layered timelines, hidden motives, and Horowitz’s trademark clever clues that keep readers guessing until the final revelation.

The novel, released in the UK on April 10, 2025, by Century (Penguin Random House) and in the US on May 13, 2025, by HarperCollins, follows Susan Ryeland after she has relocated back to England from her life in Crete. Tired of the dangers that editing murder mysteries has brought into her real life—having narrowly escaped death twice while investigating crimes tied to the fictional detective Atticus Pünd—Susan vows to leave the world of sleuthing behind. Yet, as Horowitz fans have come to expect, fate pulls her back in.

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Marble Hall Murders by Anthony Horowitz on Apple Books

This time, the hook is Pünd’s Last Case, a newly written manuscript by a young author inspired by the late Alan Conway’s Atticus Pünd novels. Susan becomes entangled when real-world tragedy strikes: a suspicious death occurs, and she finds herself accused or deeply implicated. The narrative weaves between Susan’s present-day investigation and the embedded fictional mystery, creating a mind-bending metafictional puzzle where solving the book’s crime is key to unraveling the real one. High emotional stakes abound, with personal connections, betrayal, and the weight of Susan’s past experiences adding depth to the suspense.

Horowitz, the prolific author behind Foyle’s War, Midsomer Murders, and the Alex Rider series, pays homage to golden-age detective fiction like Agatha Christie while subverting expectations with modern flair. Critics have praised the book as “diabolically clever” (New York Times) and a “fiendishly brilliant” tribute, noting its intricate plotting and satisfying resolution to the trilogy that began with Magpie Murders (2016) and continued in Moonflower Murders (2020).

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Anthony Horowitz Delivers a Devilishly Clever Meta-Mystery in …

The series’ success extends to the screen. PBS Masterpiece adapted Magpie Murders in 2022 and Moonflower Murders in 2024, both starring Manville as Susan Ryeland and Tim McMullan as the enigmatic Atticus Pünd. In January 2025, PBS announced Marble Hall Murders as the third and final adaptation, with Manville and McMullan reprising their roles. Anthony Horowitz is once again adapting his own work for television, executive produced by Jill Green. Filming began in March 2025 across Dublin, the Greek island of Corfu, and London, promising lush visuals to match the novel’s intricate storytelling.

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Lesley Manville, Tim McMullan Return For ‘Marble Hall Murders’

Manville’s portrayal has been widely lauded for capturing Susan’s intelligence, resilience, and vulnerability. As the editor who first discovered the hidden clues in Conway’s manuscripts, Susan evolves from reluctant investigator to a fully realized detective figure. In Marble Hall Murders, her arc reaches a poignant close, blending personal growth with high-stakes mystery.

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Anthony Horowitz

Horowitz himself has expressed delight in completing the trilogy: “I’m so happy to bring the Susan Ryeland series to a satisfying end,” he noted in announcements surrounding the TV adaptation. The books have garnered massive acclaim, with Magpie Murders and Moonflower Murders becoming bestsellers and inspiring devoted fans who appreciate the clever nesting of stories—real crime mirroring fictional, and vice versa.

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Susan Ryeland Series 2 Books Collection Set By Anthony Horowitz …

For mystery enthusiasts, Marble Hall Murders offers everything: red herrings, shocking twists, atmospheric settings, and a heartfelt farewell to beloved characters. Whether through the page-turning novel or the upcoming screen version, this final chapter promises a suspenseful, emotionally resonant send-off to one of the most inventive detective sagas in recent years. As Susan confronts her final puzzle, readers and viewers alike will find themselves hooked until the very end—proving once more that Horowitz remains a master of the genre.