This is not a book for the absolute beginner, its part of the Mel Bay Bass System so does not repeat introductory material from other study packs. It introduces various blues styles mostly by examples from well known classics. Interestingly for many of these it distinguishes between how the classics were originally recorded and how they now tend to be played in gigs/jams, and teaches you the current version. Just by Track 11 or so, you are playing Cream's Strange Brew, just like Jack, sort of... Its not a complete blues encyclopaedia, but does not claim to be, but it gives you a good start. So master these songs, and you're on your way.