Make sure to craft your first set of Mind Probing questions for getting the structure of each of those legal books, then chapter-by-chapter.
As the structure starts coming together, continue to craft the mind probing questions with the key words from each concept, so you're building comprehension from "whole-to-parts." Add branches on your mind maps at the end of each 30-minute activation pass.
Also, PhotoRead a couple of the books each night right before sleep, and do a Postview. Your inner mind will process those affirmations while you sleep.