J.S.Monroe is the pseudonym of British writer Jon Stock, author of The Sleep Room and Dead Spy Running. As J.S.Monroe, he is the author of five psychological thrillers, including the international bestseller, Find Me, which has been translated into 14 languages. Dead Spy Running was optioned by Warner Bros. The Sleep Room, his first non-fiction book, is about the British psychiatrist Dr William Sargant, and was published in the UK (Little, Brown) in April 2025 and in America (Abrams) in July 2025. It is currently being developed for TV.

His Final Patient, Jon’s new psychological thriller, will be published in August 2026 (Head of Zeus). When a man arrives at Swindon police station declaring it's his 'death day' before taking his own life, DI Silas Hart is shaken. Days later, another man dies in similar circumstances, a small hourglass lying beside him the only evidence police have to work with.

The trail leads Hart to disgraced psychiatrist Dr Garstan, whose controversial research claims to predict the moment of death. Both victims were his patients - but what really happened to them?

No Place to Hide, Jon's previous thriller, was published by Head of Zeus (Bloomsbury) in April 2023 and came out in paperback in March 2024. A standalone, contemporary novel set in London, Wiltshire and Cornwall, it's a loose retelling of Christopher Marlowe’s Dr Faustus. “Clever, convincing and wickedly twisty - Highly recommended,” according to Mick Herron. "Compelling, relentless and genuinely frightening," says Simon Russell Beale. "A must-read for psychological thriller fans."

The Man On Hackpen Hill (Head of Zeus, 2021,) was the third J.S.Monroe thriller to feature DI Silas Hart (head of Swindon CID) and DS Strover. "Original and brilliantly plotted, with not so much a twist as a seismic shifting of the ground under your feet ... Amazing." - Rosamund Lupton; “Impeccably researched… An unusual mystery told with exceptional skill” – Daily Mail; “A kind of Wiltshire Da Vinci Code, with crop circles, mathematical equations and shadowy figures from Porton Down. A real page turner.” – Tom Bradby.

The Other you (Head of Zeus, 2020) was the second in Jon's DI Hart series. "I doubt many other psychological thrillers published this year will be as propulsive and fun" - Daily Telegraph; "A clever mash-up of psychological thriller and police procedural with a dash of sci-fi" - Daily Mail; "You won't be able to turn the pages fast enough" - Heat Magazine; "Brilliantly original and intriguing ... Kept me hooked, enthralled and guessing to the very end" - Peter James.

Forget My Name (Head of Zeus, 2018) was the first thriller to feature DI Hart. It was published in America as The Last Thing She Remembers (HarperCollins, 2018). “An absorbing novel full of unexpected twists, topped by a savage climax” – The Times; “A book that will send thrills down your spine, even on the hottest beach” – Sunday Express.

Find Me (Head of Zeus, 2017), Jon's first J.S.Monroe thriller, was a standalone set in London, Cornwall, Cambridge and Norfolk. It has sold more than 150,000 copies and been translated into 14 languages. “Intricately woven and heart-stoppingly believable, this has bestseller written all over it” – Clare Mackintosh; “The most ingenious thriller you will read his year.” –M.J.Arlidge. "Cunning, captivating and creepy" – JP Delaney.

Dead Spy Running (HarperCollins, 2009) has been published in five languages and was the first in the Daniel Marchant Trilogy. It was followed by Games Traitors Play and Dirty Little Secret (2012). The movie rights to Dead Spy Running were acquired in 2008 by Warner Bros and the film was later in development with the director McG. Oscar-winner Stephen Gaghan wrote the original script.