The gripping new psychological thriller from the Sunday Times bestselling author of Girl Unknown.

'A really disturbing tale... Assured storytelling and neat twists' - Daily Mail
'Compelling, brilliant and entertaining. The twists just kept on coming' - Liz Nugent

Every family has secrets. But now someone knows yours.

Abi's daughters couldn't be more different. She's always felt close to Eva - her confident, older child. It's troubled young Beth that she worries about.

So when foreign exchange student Corinne comes to stay, it's a relief that Beth finally has someone to talk to.

But soon after Corinne's arrival, Abi notices changes creeping in. Beth starts to misbehave. Eva becomes distant. And everywhere she looks, Abi sees Corinne watching - and listening.

Can Abi trust Corinne? Because if not, she might already know enough to tear this family apart...

'In this well-paced thriller, Perry ramps up the tension to almost unbearable heights, leading to an unexpected and utterly devastating denouement' - Irish Independent

Praise for Karen Perry:
'Slick, engrossing, twisted and addictive. Domestic crime drama at its best. Highly recommended' - Jo Spain
'Truly remarkable... Grips your heart from the first pages and simply never lets go' - Jeffery Deaver
'If you're a fan of menacing psychological thrillers that chill to the bone, this book is for you' - Sunday Times.