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

remainder mark : Usually an ink marking of some sort which indicates that the book was designated a remainder. In most cases, it can be found on the edges of the text block in the form of a marker stripe or a stamp of some sort.

Remainder marks considerably lower the overall collectibility of a title, although, in some cases, they are acceptable to a collector.

remainder : Book(s) which are sold at a very deep discount to alleviate publisher overstock. Often, though not always, they have a remainder mark.