A girl locked in a secret room. Silence is the only thing that will save her.

A heart-stopping psychological thriller from the Number One bestselling author of The Secrets She Keeps - now a major BBC drama

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She has secrets.

Six years ago, Evie Cormac was found hiding in a secret room in the aftermath of a brutal murder. But nobody has ever discovered her real name or where she came from, because everybody who tries ends up dead.

He needs answers.

Forensic psychologist Cyrus Haven believes the truth will set Evie free. Ignoring her warnings, he begins to dig into her past, only to disturb a hornet's nest of corrupt and powerful people, who have been waiting to find Evie - the final witness to their crimes. Unbeknownst to him, Cyrus is leading them straight to Evie.

The truth will not set her free. But it could get them killed . . .

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PRAISE FOR MICHAEL ROBOTHAM:

'Robotham is an absolute master' Stephen King

'He writes in a voice with a haunting sense of soul' Peter James

'Heart-stopping and heart-breaking' Val McDermid

'Robotham is the real deal' David Baldacci

'Robotham doesn't just make me scared for his characters, he makes my heart ache for them' Linwood Barclay