The Guitarist's Scale Book

The Guitarist’s Scale Book by Peter Vogl is a complete scale encyclopedia for guitar with over 400 scales and modes. It contains scale diagrams with notation and tablature for each scale and tips on how and when to use each scale. 

This scale book also contains outside jazz scales, exotic scales, Peter's own Cross-Stringing scales, and easy to understand explanations of scales and modes. This is the only guitar scale book you'll ever need.