Less of a thriller, more a family drama, this book is about two sisters, who have very different views of their parents. The older sister, Lauren, connects more with her mother, and has done since childhood. The younger sister was more connected with her father. After their father's death, another woman shows up and claims to be their half sister, it throws the entire family into the past, and has them questioning everything they thought they knew. The two sisters and their mother are forced to reckon with their past that they thought was done and gone. A slower burn, the last fifth of the book really picks up, although I saw the ending a mile away. I'd say this is a very solid, entertaining but predictable read.