I used to only be able to read (and focus on) one book at a time. I would get so engaged in that Nancy Drew/Hardy Boys Supermystery that there was no way that I would put it down for even a moment to start another.
I've realized lately, though, that I tend to read several books at a time for different occasions. For instance, I'm almost always reading one religious and one non-religious book. I'm also usually reading something with Dan (which I'd feel guilty for reading when he's not home, much as I'd like to), as well as listening to an audiobook for when I run/cook.
So how many books do you usually read at a time? One? Twelve? Do you finish all of them?