Rusty Cutchin

A comprehensive coverage of the art and craft of guitar. It broadly covers instruments and hardware, styles and musicians, and playing.
Because of the breadth of this book, each section doesn't go into that much detail - so while the coverage is broad, the depth is reasonably light.

This is the ultimate collection of guitar instruction, style, history, technique and theory. It talks about hardware, as well. A must for any guitarist.