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.

On a field trip to the zoo, Cam Jansen uses her photographic memory to help solve what happened to Danny's lunch.

"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...

Twelve-year-old Teddy investigates when a popular Texas zoo's star attraction--Henry the hippopotamus--is murdered.

"Goat lives in a petting zoo--but doesn't like to be touched!"--

When an unexpected blizzard strands the animals of the Athensville Zoo in a seemingly empty elementary school overnight, Plum the peacock must overcome his anxiety to save his friend Itch, who gets lost in a snowdrift.

"At the zoo with her family, a girl mopes around until she is asked to help rescue the zoo's penguins from boredom"--

The Alden children investigate various mix-ups at a zoo run by their grandfather's friend in an effort to save it not only from pranksters but also from the town council.

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.

When a panda fellow artist travels all the way from China to join her zoo, Ellie the creative elephant begins to question her own talents in the face of the newcomer's distinctive style.