Topic summary
Trade paperback

Extracted from the Wikipedia article Paperback.
Trade paperback
A trade paperback (also called trade paper edition and trade) is a higher-quality paperback book. If it is a softcover edition of a previous hardcover edition and is published by the same house as the hardcover, the text pages are normally identical with those of the hardcover edition, and the book is almost the same size as the hardcover edition. The pagination is the same, so that references to the text will be unchanged: this is particularly important for reviewers and scholars. The only difference is the soft binding; the paper is usually of higher quality than that of a mass-market paperback, often being acid-free paper. In the United States, the term trade paperback also encompasses the medium-sized paperbacks described as B-format, above. British trade paperbacks are 135 mm × 216 mm (5+3⁄8 in × 8+1⁄2 in).