Best friends Logan and Caleb decide to form a club. A secret no-girls club. They write up the rules, create a secret handshake, and compose a pledge. But who will be president? They can't have a deciding vote with only two people. They're going to need some help from Caleb's little brother—and maybe even Logan's twin sister! The Kids in the Tree House is a series of illustrated early chapter books for young readers ages 6-8.