Kaylan and Arianna are new to middle school, and when they decide to make a list of eleven things that they want to accomplish before they turn twelve, including getting detention and helping humanity, they start to lose sight of their friendship.

"[This is] the third book in this laugh-out-loud series about two BFFs who master middle school with a list of thirteen goals they MUST achieve before their first summer apart. With winter break almost over and seventh grade spinning beyond their control, best friends Kaylan and Ari write a new list of 13 resolutions to make the New Year, middle school, and their friendship even more amazing before they go to separate camps next summer. But what happens...

"Ari and Kaylan aren't sure how they're going to survive their first summer apart. No pool. No sleepovers. No emergency late night chats on the porch. So as Ari returns to Camp Silver and Kaylan heads off to comedy camp, they come up with a new list of 13 and 3/4 ways to keep their friendship strong as they tackle everything from bias to batik and moping to matchmaking"--