rubbing : Abrasion or wear to the surface. Usually used in reference to a book's boards or dust-jacket.

NF : Near fine condition

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

A.N. : When used to describe the condition of a book refers to As New, "the book is in the same immaculate condition in which it was published. There can be no defects, no missing pages, no library stamps, etc., and the dust jacket (if it was issued with one) must be perfect without any tears," as defined by AB Bookman's Weekly