Set of 2. Priced below what they are selling on other platforms. These are used books with copyrights of 1991 and 1994. There are creases in the covers of both books...faint on book 11, noticeable on book 3. The pages are ruffled on book 3 from use. The pages are browing somewhat from age and type of paper used. One page has been turned down at some point on book 11. See pictures.