About half this book is "This is a drill. This is a drill bit. This is a screwdriver"
A quarter is charts and tables you will never use or be able to match equipment to. I'm an industrial electrician apprentice, and I doubt I'll ever use these pages, which were meant for people in my specialty.
The drawings are pre-1989 era (the date on this book), and therefore have old pre-CAD drawings...you can't tell what is a wire and what is pointing to a wire, so you have no idea what is labeled what...is that a blue wire? Is that a pointer? Why are two wires labeled with different colors? All line drawings, and few things that are educational.
Why does a REFERENCE book tell me what a screwdriver is? Who doesnt know that? Theres also many things lacking, such as modern Lock Out Tag Out procedures.
I'm glad I only paid a few dollars for this book; if I had paid even half the cover price, I would have been sick.
By far the most useless book in my employment library.