It's Not Summer Without You

Jenny Han is an American author of young adult fiction and children's fiction.
She is best known for writing The Summer I Turned Pretty Trilogy and the To All the Boys series, the former of which was adapted into a TV series of the same name beginning in 2022 and the latter was adapted into a film series of the same name beginning in 2018
Han was born and raised in Richmond, Virginia, to Korean-American parents.
She graduated from Maggie L. Walker Governor's School for Government and International Studies in 1998, then attended the University of North Carolina at Chapel Hill.
In 2006, she received her Master of Fine Arts in creative writing at The New School
Han wrote her first book, the children's novel Shug, while she was in college.
Shug was published in 2006 and is about Annemarie Wilcox, a twelve-year-old trying to navigate the perils of junior high school.
Her next project was a young adult romance trilogy about a girl's coming-of-age during her summer breaks. The three novels, The Summer I Turned Pretty, It's Not Summer Without You, and We'll Always Have Summer, were published from 2009 to 2011 by Simon & Schuster and quickly became New York Times Best Sellers.
The trilogy is the story of protagonist/narrator, Belly Conklin, who falls in love with two brothers she has known her whole life and works through a messy love triangle.