**SELECTED AS THE TIMES THRILLER OF THE MONTH**

**AN OBSERVER THRILLER OF THE MONTH**

'Reads like a dream but unsettles like a nightmare' A J FINN

‘A propulsive and inventive read’ GUARDIAN

'Superb . . . an ingenious whodunnit' THE TIMES

'Compelling and brilliantly crafted' SUN

'Utterly addictive' LUCY CLARKE

‘Certain to be one of the year's best thrillers’ LEE CHILD

'Will keep you turning pages well past your bedtime' NITA PROSE

'Remarkable . . . it deserves to be a breakout bestseller’ DAILY MAIL

'The twist is one of the best I’ve read' DAVID BALDACCI

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ANNA O HASN’T OPENED HER EYES FOR FOUR YEARS

Not since the night she was found in a deep sleep by the bodies of her best friends, suspected of a chilling double murder.

For Doctor Benedict Prince, a forensic psychologist on London’s Harley Street, waking Anna O could be career-defining. As an expert in sleep, he knows all about the darkest chambers of the mind; the secrets that lie buried in the subconscious.

As he begins Anna O’s treatment – studying his patient’s dreams, combing her memories, visiting the site where the horrors played out – he pulls on the thread of a much deeper, darker mystery.

Awakening Anna O isn’t the end of the story, it’s just the beginning.