They actually do have best sellers, like Dan Browns the Lost Symbol and others. They have a forum where you can request a book and they promise to get it (I think within 48 hours). I won't say they have everything but with the ability to request books, I don't see much of a shortcoming if they follow through. I haven't requested anything as yet so I can't say if they are actually able to fulfill this promise. But for the monthly subscription and unlimited downloads, I'd estimate that I've saved at least $50 in the first month compared to purchasing the downloads individually. If you're an avid reader I could see the savings being far greater.