"Twenty Boy Summer" is a young adult novel by Sarah Ockler that follows the story of Anna and her best friend Frankie. The two girls spend their summer vacation at Frankie's family beach house, where they make a pact to meet and kiss twenty boys over the course of the summer. As they navigate their adventures, Anna grapples with her feelings for Frankie's late brother, Matt, who was her first love. The story explores themes of friendship, love, and the challenges of moving on after loss, all set against the backdrop of a vibrant summer by the sea.