"The Summer I Turned Pretty Series" is a young adult trilogy written by Jenny Han. The story follows Belly Conklin, a teenage girl who spends her summers at a beach house with her family and friends. The series explores themes of love, friendship, and self-discovery as Belly navigates her feelings for two brothers, Conrad and Jeremiah Fisher. Set against the backdrop of summer, the narrative captures the complexities of growing up and the bittersweet nature of change. As Belly transitions from childhood to adulthood, she faces challenges that test her relationships and shape her identity, making the series relatable to many young readers.