Covers are flush with text pages and are affixed with glue on a perfect binding line.
Business and professional books, technical reference and other manuals. After the glue cools, the book is trimmed to its specific size. Variations include notch and lay-flat bindings. This is the most common type of binding for trade, scholarly, business, professional, religious, reference, and text books as well as catalogs and manuals. Reinforced tape is often applied along the spine for greater strength and durability.