vg : Very Good condition. can describe a used book that does show some small signs of wear - but no tears - on either binding or paper. Any defects must be noted. (defined by AB Bookman's Weekly)

spine : The outer portion of a book which covers the actual binding. The spine usually faces outward when a book is placed on a shelf. Also known as the back.

unopened : A state in which all or some of the pages of a book have not been separated from the adjacent pages, caused by a traditional method for printing and binding books in which a large sheet of paper was printed with several pages, folded, and bound into the book. . Sometimes inappropriately called uncut