This outstanding reference has 768 pages of information on carpentry, construction, science, math, electricity, electronics, first aid, general information, geology, mine and mill, money, surveying, hardware and tools, and much more. This book is great for DIY, engineers, craftsmen, students, teachers, managers, maintenance and industrial personnel, and travelers. The uses for this book that fits in your pocket are endless. Packaged 6 books to a display.