Struggling to stay cool? Flip open the pages of American photographer RJ Shaunessy’s new book  and you’ll get a lesson on how the cool kids of L.A. spend their time making summer look good. Stay Cool is a snapshot of youth and fun—as the author’s note says, it is “the story of youth…and how quickly it escapes us if we aren’t paying attention.” From making out on top of cars to hugging a patrol cop, these kids aren’t letting their youth escape them in the least.  The photos feel candid, bright and happy, and Stay Coollooks like the perfect hot day read.