Interesting that so many people have eReaders that there is that much competition for ebooks.
I really like the idea of borrowing books (for free!) from the library. I really don't care to pay for my ebooks because they could be taken away from me at the will of the vendor. Even though the books I've purchased for my Kindle are also stored in the cloud, I don't have that much faith in electronic gadgetry and those who sell it.
We are Amazon Prime members ($79 per year) and besides free 2-day shipping and free movie streaming (on a limited basis) we can check out one book per month for free from a fairly interesting list. I haven't come across recent bestsellers but there are still plenty of books I haven't read to satisfy me.
For Nooks but not Kindles ePubBooks
offers free books for download, too.