trade paperback : Often used to indicate any paperback book that is somewhat larger than a mass-market paperback.

VG- : A term used to denote a condition a slight grade lesser than VG. Very Good is defined by AB Bookman's Weekly as "a used book that does show some small signs of wear - but no tears - on either binding or paper. Any defects must be noted."

shelfwear : Minor wear resulting from a book being place on, and taken from a bookshelf, especially along the bottom edge.