I have been studying the "Thesaurus of Scales and Melodic Patterns by Nicolas Slonimsky. It's an incredible work of musical imagination with a strong rational approach to all the possible permutations. I have been playing through all the exercises and with hard work and understanding I am trying to integrate it into my playing. That's a whole other universe with which to deal. I would appreciate any insights from people in the musical field who would like to share their ideas. "One can never exhaust the mind." Leonardo Da Vinci
If you would like to buy this book from amazon here is the link.