A great primer in modern jazz guitar playing---minorizing the dominant, tritone subs, dominant 7th forms. If you've worked through Pat Martino's "Linear Expressions", you probably don't need this but if you're coming to jazz from rock and blues and feel confused, this will clear up many things for you.
Adrian Ingram is, in addition to being a first-rate player, a fine teacher. He presents material in digestible bits and provides good examples. The examples are good, not too advanced.
If you really get the basics down solid, you're further along than you think.