The ADDICTIVE THRILLER perfect for fans of Fiona Barton'sThe Child and Lisa Jewell'sThen She Was Gone.
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'I think you might be my father . . .'

Zoe Barry walks into Professor David Connelly's office and tentatively says these words.

The lives of his family - particularly his wife Caroline - are turned upside down by the arrival of this stranger.

A cuckoo in their nest

Zoe soon entangles herself in their world but her stories aren't quite adding up and Caroline isn't sure she can be trusted.

Is Zoe who she claims she is, or someone with a far darker agenda?

A daughter, a sister, a stranger . . .

By letting Zoe in, David and Caroline aren't the only ones who are vulnerable.

They're risking the lives of the most precious thing in the world - the lives of their children . . .

. . . a killer?


Praise forGirl Unknown

'This story of psychological attrition builds to an incredibly tense finale - before delivering an amazing final twist. Riveting stuff'Sunday Mirror

'Full of intrigue and incident and keeps us guessing until the very last tragic page'Liz Nugent, bestselling author ofLying in Wait

'Karen Perry writes intense psychological thrillers that explore emotional danger with relentless, surgical accuracy, and this may be their best yet'Tana French, bestselling author ofThe Trespasser

'One of the most richly satisfying psychological thrillers of 2016, a book that hooks the reader from the first page'Irish Independent

'A taut, tense psycho-gripper'Sunday Sport