Reading books is a wonderful thing. One of the wonders if how it affects how you experience time. Sometimes you notice you have lost hours without noticing. Other times it feels like you have been reading for hours but only a fraction of that had actually passed.
This relative time can happen with any book. What I have noticed however is that usually it's those long 1000+ page tomes that usually end up making the passage of time feel much longer than it actually is. Likewise the shorter ones seem to have the ability to compress time.