I noticed you said you have read HP4AP over twenty times. Over would span of time and how often. Do you read the whole thing, flip around, certain sections...? Just curious as to your way of doing it. I usually read the book once through. Then asses what value the books has to my game. If it has good value I will study the chapters one by one until I get a good understanding of most concepts. Then I will refer to it maybe a month later with a fresh perspective again highlighting the key issues and new things I learned. Do you do something similar?