"It's a wonder-fowl day in Wild Zoo Yonder as Penny the Pig leaves the petting zoo behind in favor of excitement and adventure! When she runs into Fennlock Fox in the midst of a karate-chop action sequence, she thinks she's found a partner with the perfect koala-fications. There's just one problem--Fennlock has never actually left the safety of his cage. But when the animals start disappearing all over, launching the zoo into total panda-monium, will Fennlock be able to help Penny save the day?"--Back cover of Volume 1

Description from volume 1.

Volume 1.Kingdom caper -- Volume 2. Run, monster, run! -- Volume 3. A new sheriff in town --|g Volume 4. Medieval mayhem.