GC.The Crime Club. No Date given but probably 1950's. Small format paperback (small tears, creases and nicks on the edges of the cover and spine) in GC. Illustrated with a b/w diagram. Clean pages with some ink marks and slightly tainted on the outer edges, the first four pages of the books has come loose but still included with the book, foxing marks inside the front and back cover, creases, small ink marks and slightly tainted on the edges of the pages. The book is in GC for its age but the spine of the book has been sellotaped down. 188pp.