The stunning new domestic noir thriller from the author of the bestselling The Missing One and The Other Child. Perfect for fans of I Let You Go and The Ice Twins.She knows what you have done . . .London-based TV historian Olivia Sweetman has everything - a successful career, three beautiful children, and a talented writer husband. In a small Sussex museum one day she meets Vivian, the socially awkward sixty year old housekeeper of nearby Ileford Manor. When Vivian shows Olivia the sensational Victorian diary she has found, Olivia is desperate to write a book about it. But in order to secure access, Olivia must put her misgivings aside and hire Vivian as her research assistant. Eighteen months later, with the book finished and tipped as a bestseller, Olivia is relieved to be shot of the difficult, if highly efficient, Vivian. She takes a much-needed summer holiday with family and friends in the South of France. But a bizarre and unsettling event shatters the holiday, throwing Olivia's life headlong into crisis and soon everything she has worked for - her family, career and reputation - is on the verge of collapse. But why?There is only one person who knows the truth that can ruin her. How far will Olivia go to save her own skin?