what would you recommend as a good book for learning how to read music for bass guitar? there seem to be a few. what's one of the better ones? how is the Music Reading For bass by MI Press? and what about a cool bass theory/fretboard book? something that kinda opens up the neck a bit for ya. again, there seem to be a few nice ones, which ones are really worth it? is the Gary Willis fretboard book a good one?