Wayside School Is Falling Down is a 1989 children's short story cycle novel by American author Louis Sachar, and the second book in his Wayside School series. Like its predecessor, it contains 30 stories, although some stories are interconnected in more complex ways than they were in the series' first book. Through-lines in the book include the introduction of a new student, Benjamin Nushmutt, and Allison's trip to the nonexistent Miss Zarves' classroom on the 19th story. The book's title comes from the favorite song of one character, Kathy, to the tune of "London Bridge Is Falling Down".