I seem to never be able to stick to one book at a time...I always seem to be dashing back and forth between books. Right now I am reading six books!
However, I've realized the exercise (and rest) of our mind is important too! My mind gets exercised by reading about new ideas, new places, and learning new words. And it gives my mind a rest at the same time from thinking about the millions of things there are to do. It's a little escape in my day to refresh me.
What does your reading pile look like? Do you ever feel guilty sitting down to read?