The Summer I Turned Pretty is a young-adult romance novel written by American author Jenny Han. It was published by Simon & Schuster in 2009 and it is the first book in The Summer I Turned Pretty trilogy. The trilogy includes the sequels It’s Not Summer Without You (2010), and We'll Always Have Summer (2011). Jenny Han is also known for her New York Times–bestselling books in the "To All the Boys I've Loved Before" series.
The protagonist, Isabel or "Belly," has grown up spending summers at Cousin’s Beach with her mother and brother, as well as the Fishers—her mother’s best friend and her two sons. Since she was young, she has had a crush on Conrad, the elder of the two brothers, and a close friendship with Jeremiah. Though Belly has been in love with Conrad, he hasn't seemed to reciprocate her feelings until this summer. Over the course of the summer, Belly comes of age as she navigates themes like first love, friendship, family, and death.
Publishers Weekly wrote, of Han's story, “This well-written coming-of-age story introduces 15-year-old Isabel, aka Belly, for whom summer has always been the most important time of year. Han realistically balances Belly's naïveté with her awareness of the changes the years have brought.”
In 2021, Jenny Han and Gabrielle Stanton collaborated to develop an Amazon television series based on the novel and the two sequels. The series premiered in June 2022.
