Zoobreak — Gordon Korman

ZOOBREAK: the release of animals from the inside of a zoo, sometimes illegal, always dangerous...

A monkey is missing. And not just any monkey -- it's Cleo, friend of Savannah Drysdale and a certain Doberman named Luthor. Savannah, Luthor, and Savannah's friends Griffin and Ben search everywhere for Cleo -- but all they find is one very suspicious banana.

The next day, Griffin, Savannah, and Ben take a field trip to a floating zoo ... and find a monkey who Savannah swears is Cleo. But the evil zookeeper, Mr. Namaste, isn't going to give her back, and other adults aren't going to help.

Luckily, Griffin Bing is a Man With a Plan, and he, Ben, Savannah, and their other friends are soon planning the biggest zoobreak this floating zoo has ever seen. There's only one big problem: If you break a bunch of animals out of a zoo, where do you put them once they're out?