Books in Zippo the Super Hippo series

Zippo doesn't want to be an ordinary hippo. He wants to be super! Being good at swimming and splashing in mud aren't really superpowers, though. Perhaps he can fly, like his friend Roxi. But who's ever heard of a flying hippopotamus? Especially one with such a big bottom. This fantastically funny superhero will be flying into children's imaginations everywhere!

Zippo doesn't want to be an ordinary hippo. He wants to be super! Being good at swimming and splashing in mud aren't really superpowers, though. Perhaps he can fly, like his friend Roxi. But who's ever heard of a flying hippopotamus? Especially one with such a big bottom. This fantastically funny superhero will be flying into children's imaginations everywhere!