An unobservant zookeeper is followed home by all the animals he thinks he has left behind in the zoo.

While on a school field trip to the zoo, Harry accidentally allows the monkeys to escape their habitat, and he thinks he can fix the mess using one of his superhero inventions.

Noah, Megan, Richie, and Ella must navigate a maze of never-ending aquariums in the Secret Zoo to rescue their animal friends.

"On Halloween night, the scouts, along with their Descender allies, must battle terrifying sasquatches at their own elementary school. Little do they know, the sasquatches are merely the bait to a trap. DeGraff captures three of the Descenders and drags them into a frightening, off-limits sector of The Secret Zoo. Meanwhile, Noah and his friends must protect two of their animals allies from police officers who are convinced that they are dangerous...

Having discovered a magical society beneath the exhibits at the Clarksville City Zoo where animals and humans live harmoniously together as equals, Noah and his friends must protect the secret zoo at all costs.

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.

When Zookeeper Fred's green snake Vern gets loose in the zoo, the Questioneers need all their talents to help find him, but in the end, it is Aaron's art that leads the way. Includes facts about snakes.

A.J. and his fellow third-graders from Ella Mentry School, including new student Alexia, go on a field trip to the zoo, where they meet a very strange zookeeper.

A young vampire trades places with a penguin at the zoo for a day of mischief and fun.

When twelve-year-old Ana's zoologist parents move the whole family into the zoo, the Sneers--the clan of carnivorous female predators in her class--have even more ammunition to make her life miserable, although she tries to act like a chameleon and fade into the background.