“Walking Bass Lines for Jazz Guitar” by Stephan Badreau is a step by step guide to harmonizing bass lines on the guitar.  The book will show the musician how to connect familiar chord shapes with the appropriate bass notes.  It is full of ideas, examples, chord voicings and substitutions, as well as short chord progressions for you to try your new learned skills.  All examples are played on the accompanying CD at both slow and normal speed, as well as a “drums only” version for play along purposes.  Stephan has been using this approach with many of his music students to great effect.