NOVA English learning textbooks, Level 6, set of 4 books. - Series Name: NOVA English Level 6 - Volumes: Book A, Book B, Book C, Book D - Seasons: Spring, Summer, Fall, Winter The condition varies depending on the season, but there are creases, and no writing. However, only the Summer book got wet on the bottom, and there are traces of it being dried and peeled. All pages are usable for learning.