There was a terrible mistake - Wayside School was built with one classroom on top of another, thirty stories high (The builder said he was sorry.) Maybe that's why all kinds of funny things happened at Wayside-especially on the thirteenth floor.

    Sure, he’s always been a little bit different—his tusk isn’t as long, he’s not as good of a swimmer, and he really doesn’t enjoy the cuisine. Then one night, an extra strong current sweeps Kelp to the surface, where he spots a mysterious creature that looks just like him! Kelp discovers that he and the creature are actually unicorns. The revelation leaves him torn: is he a land narwhal or a sea unicorn? But perhaps, if Kelp is clever, he may find a way to have the best of both worlds.