There's a lot to recommend for backtracking. Newton backtracked multiple times to understand the math from an astrology book he picked up. Also, if you're ine

There's a lot to recommend for backtracking. Newton backtracked multiple times to understand the math from an astrology book he picked up. Also, if you're inexperienced, how are you to tell who the Master's are? I fear that whatever book is renowned for its difficulty will become the Master's book. The advice is like, find the steepest slope you can, then climb it. You may not get very far, but you'll feel good that you got anywhere at all.