This book, Manual of Built-Up Roof Systems, is a hardback in good condition.  The dust jacket is worn and tattered a bit but has done its job to protect the book. This book shows the design and construction of built-up roof systems.  It has 240 pages of text, pictures, and illustrations on the Built-Up Roof System.  The book has some foxing on the pages from age, but the book is clean, and tight, free from rips, tears, or writing.   Please look at the pictures and ask questions.