I have been playing bass for about 4 or 5 years. I started out playing upright and have made the transition to bass guitar within the last three years. I would call myself an intermediate bassist. Is there a Intermediate Bass Guitar method book that you would suggest? I've played around with most of the Hal Leonard bass books, but I'm looking for something a bit more in-depth. The bass I have is a six-string bass. So if there are any six-string intermediate method books, that would be awesome. I just don't know if there is a particular method book that sticks out from the rest!