Class set of the book. Comes from a clean, nonsmoking home/classroom. The books may have Accelerated Reader numbers and/or grade level written on the front cover (pictured if so), or a number, school stamp, or teacher name written on the inside cover. Otherwise the books are in very good condition with no missing pages or writing and minimal wear. *This is to the best of my knowledge as I did not look through every single page of every single book.