If you want to sharpen your own drills, lathe tools and milling cutters then this is the book for you. Clear diagrams and good hints. It's weak on woodworking tools so I'd go elsewhere if that's what you want to do. As another reviewer say's the book with apostrophe's s'cattered all over the place is'in dire need of proofreading and sentence's are often muddled up. If you can make sense of the last sentence then you'll be alright.