An absolutely addictive thriller. Perfect for fans of Lisa Jewell, Lianne Moriarty and Louise Candlish. How well do you know your children? And how well do they know you? When Helen Whitmore's stepson brings home a new girlfriend one evening, her already imperfect family begins to tip towards breaking point. Diana is smart, beautiful, feisty and clearly out to cause trouble. Then an old photograph resurfaces that threatens to uncover a long-buried secret, one that Helen has taken great care to keep hidden in the past. Only one person could have that photograph – and she is dead. Helen immediately suspects that Diana is connected somehow, but before she can confront her, Diana is found dead and the entire family has motive.