"The Summer I Turned Pretty" is a young adult novel by Jenny Han that follows the story of Belly, a teenage girl who spends her summers at a beach house with her family and friends. The narrative explores her coming-of-age experiences, including her feelings of love and friendship, as she navigates the complexities of adolescence. Set against the backdrop of summer, the story features Conrad and Jeremiah, the brothers who have been part of Belly's life for years. As she matures, Belly finds herself caught in a love triangle, leading to emotional growth and self-discovery throughout the summer.