"The Rosie Project" is a novel by Graeme Simsion that follows the story of Don Tillman, a genetics professor with social difficulties who decides to find a wife using a scientific approach. He creates a detailed questionnaire to filter out unsuitable candidates, believing that logic will lead him to the perfect partner. However, Don's plans are disrupted when he meets Rosie, a free-spirited woman who doesn't fit his criteria. As they embark on a quest to find Rosie's biological father, Don learns valuable lessons about love, acceptance, and the unpredictability of relationships.