Yeah, I was thinking about that. I commute every day during the school year, and I always listen to audio books. So perhaps when school starts again, I'll be listening to that.
Although, I've always thought I should buy the books too, so that I had them on hand, in case I ever have to work with older children. I think they're a little bit out my second graders range, but older kids enjoy them, and they could probably check them out from me with their parents approval (even though I totally hate that the books are censored at school)