Fretboard Roadmaps: Bass Guitar. Discover how to find your way around the whole fretboard with confidence with this vital book and CD, using the essential patterns that all the pros know. Whether you are writing, recording, improvising or jamming, a sound knowledge of the fretboard of your instrument will keep you out of trouble. By using simple patterns, and learning how those patterns repeat across the bass, you will no longer have to struggle to find the all-important right notes.