I always have at least 4 to 7 books going on at one time.
Most are of a different theme. I get in moods where I want to read a historical or paranormal book and then there are times when I want to read a suspense or heartwarming type of book.
One time I read a chapter from each book then went back and read another chapter from each book till one hooked me in. It was kind of like flipping through TV channels looking for something to watch.