Joseph alexanders book have addressed that gap problem they are very rich with information and instructions and interesting applications

You are often left wondering if you really need to learn from a book if you can play the way they suggest you should play

and the advanced ones well

Two years ago i had no idea where i could get to with my guitar i had been noddling around for some time but no major improvement were made whatsoever the problem being that you are not really a beginner but not really an advanced player and most of the books pretend to be for one or the other but in reality the beginners book are really basic borderline boring