'You don't know me, but I'm your sister.'

Claire is shocked when she receives a message out of the blue from Sophie, a beautiful young woman who tells Claire that she's their father's secret child. Having spent years nursing her sweet little daughter Ella through a life-threatening illness whilst dealing with the emotional fall-out of a devastating marriage breakdown, Claire feels tentatively excited to meet Sophie. Perhaps she might finally have someone in the family to lean on...

As Claire welcomes her sister into her life, she's delighted to see just how much Ella loves her new Aunt Sophie. But as the pair spend more time together, Claire begins to wonder where exactly her perfect new sister came from and what kind of person she really is. With their elderly father's mind rapidly deteriorating, is it possible that he's hiding something from Claire about Sophie's sudden appearance in their lives?

When Sophie suggests a family day at the seaside, little Ella is beyond excited. But as Claire takes an important phone call from her demanding ex-husband, leaving Sophie in charge of Ella, something unthinkable happens. And as Claire rushes into the ice-cold sea towards the small, limp figure of her daughter, she realises that Sophie was watching the whole time. But why would Sophie want to hurt Claire's precious daughter? Was trusting her new sister with Ella the biggest mistake of Claire's life?

If you enjoyed The Girl on the Train, My Lovely Wife and Lucinda Berry's The Perfect Child, you'll love this heart-stopping psychological thriller from bestselling author Sheryl Browne.

What readers are saying about The Family Secret:

'Shocking, brilliant page-turner ... A stunning thriller... This book will grip you immediately and by the last twenty percent, shock you, scare you and make your heart beat right out of your chest ' Goodreads reviewer, 5 stars

'Gripping and hard to put down. I spent an entire day reading it. One of the best thrillers I've read in a long time ' Netgalley reviewer, 5 stars

'A wonderful, tense domestic psychological thriller that hits ALL the buttons.' Goodreads reviewer, 5 stars

'Another fantastic hit from this wonderful author Unputdownable. So many twists, it has your head reeling in that wonderful, mind-blowing way. Don't pass this one by, it's worth every second of your time.' Goodreads reviewer, 5 stars

'A brilliantly written, addictive page-turner.' Goodreads reviewer, 5 stars