I agree with Christopher. In all honesty, no book will ever make you sound great. When you are actually playing, your ears will do the work and you will find that you make almost any note work (within reason) if you truly believe it's sound will achieve you what hear. This comes with a wealth of practice. One thing I often practice is to loop a droning single note and to play every other note against that single note. This will help you truly hear each interval and at that point you can begin to express yourself your own way.

We all know though that every style has it's own trends interval wise. With blues, you never want to play a major 7. That is about all I know to be true in my experience. However, you can do whatever you want as long as you make it work. Experiment on your own and don't let books and theory run your life.

Best of luck!