So far Kindle has free books and 99cent books that I would not buy anyway. Classics, unknown authors for Kindle, and younger books that were too terribly great. Nothing I would personally want. They claim they have a lending library now, but I can't find anything more than their free books, oh and yes they throw a goodie in their now and then.
I am apalled at the prices of their books. I recently bought a used paperback that was printed 35 year ago-(Spenser for Hire), that sold back then for $4.50!!!!! I paid $5.00. KINDLE wanted $6.99! Sadly, the Kindle is not worth it to me. I'm barely using it at this point. I hate to be taken for a ride and that's what's happening.
AND at least I can pass on a good paperback to a friend without any limitations whatsoever. Imagine, buying a kindle book and being told how and when and what you can do with it. It used to be no sharing, now you can share it a limited amount of times. With a paperback, I can share it limitlessly.
Unless you buy it as a glorified Tablet!