Innocent sleepwalker. Or a sleeping killer? You decide.

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*THE SMASH HIT NO.1 INTERNATIONAL BESTSELLER

*A GUARDIAN THRILLER OF THE MONTH

*A SUNDAY TIMES THRILLER OF THE MONTH

*TV IN DEVELOPMENT WITH NETFLIX

‘The twist is one of the best I’ve read’ David Baldacci

'Anna O reads like a dream but unsettles like a nightmare' A J Finn

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IT’S THE CRIME OF THE CENTURY

Everyone knows the Anna O case.

Everyone knows it was her fingerprints on the knife.

But no-one knows the secrets of her sleepwalking.

No-one knows whether she really meant to kill that night.

As a trial nears, the mystery reawakens.

Is she innocent, or guilty?

IT’S TIME TO PICK A SIDE

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Readers are DREAMING of Anna O:

‘This is my favourite book of 2024 … the bar has been set’

‘This book is a true definition of murder mystery’

‘A triumph! It’ll keep you awake at night’

‘Explosive twists and turns that lead to a sensational finale’

‘Well worthy of five stars’

‘Mindblowing and suspenseful!’

‘This story has it all’

Matthew Blake's ANNA O is a riveting blend of suspense and psychological fiction, with a medical twist that keeps readers on their toes. The narrative is a top-notch crime story that delves into the darkest chambers of the mind, making it a new addition to the literary world that is hard to put down.

For fans of Freida Mcfadden (The Boyfriend), Alex Michaelides (The Silent Patient), John Marrs (The Family Experiment), Harlan Coben (Think Twice), and Lisa Jewell (None of This is True).

HarperCollins 2024