If the gutter is wide enough, you can have them rebound with spiral binding. This is incredible useful for holding or putting a book flat. I did this to all my textbooks in college.
I don't understand why Cracking The Coding Interview never published a two volume spiral bound book. It's the perfect candidate: it's huge, you're referencing two different sections regularly, and you stay on one page for quite a while. I never ended up doing it to my copy though.
juiceland · · focus · HN ↗
AdamTReineke · · focus · HN ↗