Sideways Stories from Wayside School — Louis Sachar

A CRAZY MIXED-UP SCHOOL.
There'd been a terrible mistake. Wayside School was supposed to be built with thirty classrooms all next to each other in a row. Instead, they built the classrooms one on top of the other ... thirty stories tall! (The builder said he was very sorry.)

That may be why all kinds of funny things happen at Wayside School ... especially on the thirtieth floor. You'll meet Mrs. Gorf, the meanest teacher of all, terrible Todd, who always gets sent home early, and John who can read only upside down -- along with all the other kids in the crazy mixed-up school that came out sideways. But you'll never guess the truth about Sammy, the new kid ... or what's in store for Wayside School on Halloween!