No Boy Summer - Amy Spalding

Lydia and her younger sister Penny make a pact to avoid boy drama for the summer—but Lydia can't help looking for a loophole when she falls for a cute girl
Lydia Jones and her younger sister Penny have had it with boy drama. Last year was marred by relationship disasters for both of them, threatening Lydia's standing with her school's theater tech club and Penny's perfect GPA. Penny has, naturally, diagnosed the problem and prescribed a drastic solution: a summer off from boys.
Lydia and Penny decide to stay with their Aunt Grace and her boyfriend Oscar in Los Angeles while their parents are off on a European cruise. Penny follows her future-business-school dreams with an internship at Oscar's office, and Lydia gets a part-time job at Grace's neighborhood coffeeshop, Grounds Control.
Even when they spent hours, days, weeks dissecting their various boy drama, Lydia's never felt this connected to her sister before, and it makes her wonder what else...