Six YA stories about life-changing summers

At the BN Teen blog Natalie Zutter tagged six YA books about life-changing summers, including:Proof of Forever, by Lexa Hillyer

Hillyer’s debut has been called “The Sisterhood of the (Time) Traveling Pants for a new generation,” because instead of a magical pair of formfitting jeans, you’ve got a photo booth that transports four former best friends back to a summer camp session two years prior.