When the wild animals of Ankle Snap Alley start disappearing and Kit the raccoon discovers that they are being taken to the zoo, he leads the Moonlight Brigade on a daring rescue operation to free his friends and family but runs into opposition from animals who prefer a life of protection in the zoo over one of freedom in the wild.

After a class trip to a floating zoo where animals are mistreated and Savannah's missing pet monkey is found in a cage, Long Island sixth-grader Griffin Bing and his band of misfits plan a rescue.

Noah and his friends in the Secret Society join forces with four teens known as the Descenders to try to protect the Secret Zoo hidden below the Clarksville City Zoo from monstrous sasquatches and the evil Shadow Master.

At the zoo, twins Josh and Danny willingly try out Petty Pott's new REPTOSWITCH formula and enjoy being snakes until they are spotted by a group of girls on a field trip, including their camp friend, Charlie.

When a gorilla who knows sign language tells his keepers that he is lonely, they bring him a very special friend.

Twelve-year-old Andrej, nine-year-old Tomas, and their baby sister Wilma flee their Romany encampment when it is attacked by Germans during World War II, and in an abandoned town they find a zoo where the animals tell their stories, helping the children understand what has become of their lives and what it means to be free.

Nancy Drew investigates when a pony from the petting zoo keeps escaping from his pen.

Twelve-year-old Teddy Fitzroy is the prime suspect when FunJungle's newly-acquired koala goes missing, thanks to a prank staged by middle school bully Vance Jessup.

After the zoo closes, monkey slips out of his cage to explore the zoo, introducing the reader to the other animals and the idea of opposites.

"Amelia Bedelia is sick the day her class goes to visit the zoo. She doesn't want to be left out, so she comes up with a brilliant idea--she'll create a zoo in her backyard, using all her classmates' pets. But she doesn't know exactly how to tell her parents about her great plan"--