This is a set of three books from the Gakken Asobi no Ousamazukan series: Animals, Insects, and the Body. The covers have been removed. My two children enjoyed reading these, so the exteriors show overall discoloration, scuffing, scratches, and dirt. However, the insides have no noticeable stains, scratches, or tears, and are still perfectly readable! For those who understand that these are used books, please take a look at the photos and consider purchasing them (o^^o)