Not sure how long BookSwim has been around, but I just discovered it. Basically you pay a monthly fee to have a certain amount of books delivered to your door. You then read them and return them in exchange for new books, etc.
Subscriptions run anywhere from $9.95 a month (plus shipping) for a single book to $59.95 if you’re ambitious enough to tackle 11 books a month.
My initial reaction is this: