There was a terrible mistake: Wayside School was built with one classroom on top of another, 30 stories high, instead of flat on the ground, one classroom next to each other! (The builder said he was sorry.) Maybe that's why all kinds of funny things happened at Wayside-especially on the 13th floor, which doesn't exist. Lois Sachar, best-selling author of the Wayside School series, knows how to make kids laugh. And there are laughs galore in Sideways Stories from Wayside School.