I'm studying for ATPL law at the moment also so I've gone through my CAR and highlighted all the headings in the contents page for each section, and the headings in the main text that have anything to do with the ATPL syllabus.
Hopefully, if I need to find something, I can flick through the text and the highlighted headings will jump out at me.
But it is a completely pointless exercise, completely at odds to the real world...but then that's what CASA is about.