Selling to organize my bookshelves. These books have been used normally and show some wear, but there are no missing pages or writing. The cover spines have some tears (see photos 3 and 4, etc.). This 4-book set is a great deal! Please understand that these are used items before purchasing. "Why? How? Science Stories for 1st Graders" "Why? How? Everyday Questions for 2nd Graders" "Biographies You Can Read in 10 Minutes for 1st Graders" "Biographies You Can Read in 10 Minutes for 2nd Graders"