Are you forming mind probing questions, from your trigger words, as you activate it?
Also be sure to collect some trigger words for each chapter. Work in layers, expect to pull out the information in multiple passes not just one. Unlike regular reading we build the conscious comprehension by repeated viewing. Write your questions down so that you can focus on finding the answers.
Set a timer for your activation passes. Keep them to 20 to 30 minute and remember to take regular breaks.
What no one really notices... The conscious mind has to forget in order to make room for the next bit of information. (the 5 to 9 bits of information maximum) If you're already holding onto 8 bits of ideas there is no room until you let go of it. So build your mind map with the multiple passes through the chapters.
Alex