Random House (randomhouse.com/kids)
Okay, girls, you young ones “have your period” every month (subtle gloating here). Imagine that instead you spend those four days as a fully equipped young man. Add in the fact that your young man self and your best friend are in love. For extra-added pain, you can’t remember what you (he) does these days. This fun, easy read goes beyond a cool plot and a predictable story to a quiet exploration of how we learn to accept all of our parts. —Review: A.C.