I’m one of those people to have a few books going at one time, and that has only gotten more true as the reading devices have expanded. I have a book for reading to and from work and on my breaks, I have whatever story time book we’re reading, and I generally have a non-fiction going at the same time. My reading habits are influenced by my moods, to be sure.
Currently I’m reading Passion’s Sacred Dance the first book in the Harshad Wars books, by Juli D. Revezzo (and yes, I recommend it!), as well as rereading George R. R. Martin’s A Game of Thrones for story time. I’m somewhat still picking through Color: A Natural History of the Palette, but I’m only a few chapters into it and am bringing it back today. Not sure which nonfiction will be next . . .