Sideways Stories from Wayside School, by Louis Sachar. (Avon Books, Humorous episodes from the classroom on the thirtieth floor of Wayside School, which was accidentally built sideways with one classroom on each story.
Corduroy by Don Freeman is the first in a long series of picture books about little teddy bear. In this one he's living in an apartment store, forgotten on a shelf long enough he's lost one of his buttons. This book is part of my childhood!