Having used the author's helpful Ebay guides to date vintage mens' clothing, I bought the book in advance. With sections such as "Trademarks," "Union Labels," and "WPL & RN Numbers," she provides what is easily the best book on the subject. There are numerous other chapters devoted to types of mens' clothing, including separate chapters on topics such as shoes and robes. There's even a chapter on Fasteners. Where else are you going to find this kind of well-researched information?
Highly recommended!