Before there was The Girl on the Train, before there was Gone Girl, there was Rosamund Lupton's Sunday Times top-ten bestseller Sister

Their bond was unbreakable.
The truth was unimaginable.

When Beatrice gets a frantic call in the middle of Sunday lunch to say that her younger sister, Tess, is missing, she boards the first flight home to London. But as she learns about the circumstances surrounding her Tess's disappearance, she is stunned to discover how little she actually knows of her sister's life - and unprepared for the terrifying truths she must now face.

The police, Beatrice's fiance and even her mother accept they have lost Tess, but Beatrice refuses to give up on her. So she embarks on a dangerous journey to discover the truth, no matter the cost.

Praise for Sister:

'Truly marvellous! As compelling as it is stylish, Sister exists in that rare place where crime fiction and literature coincide' Jeffery Deaver

'Nicci French via Ford Madox Ford. Sister is so ably done, so perceptive about grief and guilt and self-delusion' John O'Connell, Guardian

'With Sister, Lupton enters the highly charged ring where the best psychological detective writers spar, her hands raised in a victory clench . . . Like Kate Atkinson, Patricia Highsmith and Ruth Rendell, Lupton builds suspense not only around the causes and details of her story's brutal denouement, but also around the personalities . . . Both tear-jerking and spine-tingling' New York Times

'Lupton's crisp insights into grief and familial guilt are married to a confidently executed plot. Lupton's persuasive narrative voice is what keeps this classy debut (on track)' Emma Hagestadt, Independent

'Stunningly accomplished from first page to last, this is the most exciting debut thriller I've read all year . . . Written with the power and panache of a young Daphne du Maurier; it's devastatingly good' Daily Mail