I was amazed that these people had never played together before but at the drop of a hat could throw together a pretty good sounding song! Clearly there is a common foundation that they are using to create this music. I'm motivated to add blues instruction to my current primary focus of study: reading music. As a total blues beginner, I did some searching and discovered the "circle of 5ths" and the 12-bar "pattern". But what else is next? Should I just buy a book or are there some good online resources (my searching gets lots of results, but its hard to tell if I'm getting good info)? Does one start with chords and applying the 12-bar pattern? Or learn blues scales that apply to specific chords (is this even true?) and try to mix it up? Pretty overwhelming on one hand, but pretty exciting to be scratching the surface of something that from what I've read is must-know material for any bass player with his/her salt. Any recommendations?