Hal Leonard Guitar Techniques Book - Fretboard Roadmaps

Fretboard Roadmaps isn't a bad reference book. It has large, clear diagrams and it's written in a very straightforward, "do this, get that" style. Unfortunately, it's also not a terribly deep book. By that, I mean it doesn't really go beyond very basic chord and scale theories. If you're an intermediate to advanced player, it probably won't reveal anything you don't already know or at least instinctively execute. If you're a beginner or you really have no clue as to what a pentatonic scale is, then this is a fine place to start. Seasoned players will most likely find the journey a bit short, however.