I'm in the same boat! For me, I've found that parsing chapters among different books to be so much work that it doesn't leave time for reading! I keep a list that contains:
1) Books to Read
2) Books I Want
3) Books I Want to Revisit
I'll split my books to read list into A) Professional/Personal Improvement (any book that involves any action outside of just reading like Mr. Allen's books for example) and B) Pleasure/Educational (any book that I want to read for fun or to enlighten myself for fun.) I make the distinction as easy as possible so I know I will always follow through: Will I need to write/think/practice something I learn in the book or would I be able to read this book before bedtime to relax. Then those titles are added to the list.
As I find or read about titles I am interested in, I'll add that to my Books I Want list and decide which catagory it applies to. I have to keep myself on a strict rule of no new books until my list is 2/3 completed as I'm a book junkie and if I had my way my house would be filled to the rafters with books. My addiction is another compulsion to work on that list and read those books cover to cover so I can head back to the bookstore!
If I find a book that I want to revisit (GTD for example) I'll put a reminder in a tickler file from anywhere 4-8 weeks away with notes to remind myself what I wanted to review. Even for a scatterbrain like myself, this system works exremely well.