This is an index I created for the SANS 560 course, SEC560. The columns are Book, Page, Topic. I found many useful tips on building an index from the reference links below. I color coded the book with colored tabs at the top of each book. These are reflected in the Book and Page columns. Then on the right side of the book, I put colored tabs for each section, alternating colors. This is reflected in the Topic column. This is a very high level explanation of my process, but reading the reference links should give you a good understanding of my process.
I have included my index in PDF format along with an image of the tabbed 560 books.
References:
https://tisiphone.net/2015/08/18/giac-testing/
http://digitalforensicstips.com/2012/11/sans-index-how-to-guide-with-pictures/