Editions trade edition a standard 6 x 9 (technically 5.32" x 8.51') paperback edition of a book, usually perfect bound for durability. hardback edition a 6 x 9 (5.32" x 8.51") trade edition affixed to hardcover using a single stitch and glue. Technically not a hardcovr at all. library edition a 6 x... Sign in to see full entry.