The novel follows the story of a woman named Rosemary who grew up in an unusual family, with her parents being behavioral scientists and her sister being a chimpanzee, part of an experiment her parents were conducting. As she grows older, Rosemary grapples with the loss of her sister, who was sent away when she was five, and her brother, who left the family due to the emotional turmoil caused by the experiment. The book explores themes of memory, family, and the ethical treatment of animals.

This novel delves into the life of a teenager grappling with obsessive-compulsive disorder as she embarks on a journey to solve a mystery involving a fugitive billionaire. The story is as much about the complexities of friendship, love, and coming-of-age as it is about the protagonist's internal struggles with her mental health. Through her eyes, readers are offered a deep, nuanced understanding of living with mental illness, all while navigating the challenges of adolescence. The narrative combines elements of mystery, romance, and a profound exploration of the human condition, making it a compelling read for young adults and adults alike.