13 and 3/4

• Ari is Jewish and returning to her beloved Jewish summer camp. The campers have nikayon (clean up) time to tidy their bunks after breakfast, say the motzi and Birkat Hamazon (blessings before and after meals), and have breira (free choice) every afternoon.
• Ari reflects on Shabbat being a time when we don't ask for more, but we show appreciation for what we have. She also makes a reference to the Jewish saying of "Save one life, save the world."
• Ari’s Bubbie suggests she teach Ari Yiddish so they can have a secret language. Also, the girls want to have a conversation in another language. Since Ari knows some Hebrew, Kaylan begins learning some to surprise her friend.

Best friends Ari and Kaylan make a list of things to do to help them feel connected while they’re apart the summer before eighth grade. Though excited about arts camp, Kaylan is also terrified about going to camp for the first time. Ari’s returning to her beloved Jewish summer camp, but she worries about Bubbie's health and that younger sister Gemma (a first-time camper) will cry and be homesick every day. In alternating chapters, the BFFs detail their camp interactions with friends, both girls and boys (Ari reunites with her camp boyfriend; Kaylan has her first camp kiss), as they each complete items on their list. “Keep a gratitude journal” results in two happy campers; “Sneak out of the bunk at night” has some unhappy consequences. There’s a bit of friendship drama involving Kaylan’s mother dating Ari’s camp friend Zoe’s father (Ari learns some big news and doesn’t tell Kaylan), but the girls work things out in time to bury a time capsule together (last item on their list) and declare their undying friendship once again. This is the fourth book in the Friendship List series that includes the PJ Our Way title 12 Before 13.