PERFECT BINDING

In this binding, the pages of the text block are glued, or side stapled together, then trimmed on all edges. A soft or stiff paper wrapper is attached to the block with flexible binding glue. The result is a smooth, flat spine that provides space for text like the title, author, and publisher. Perfect binding is typically used in trade paperback and mass market paperback books.

The image shows three perfect bound trade paperback books.