Joseph Jenkins writes about the history, installation and repair of slate roofs with a hands on approach. The sources for tools and slate listed in the reference section alone is worth the price of the book. Where asphalt and fiberglass shingles will possibly last 20-25 yrs., the ability of a slate roof to last 75-100 plus is a worthy investment, and can only add to the value of any home. This book should be required reading for home remodelers, contractors, builders, and historic preservationist.