Isn't it the other way around? The big 6 major publishers will not allow their ebooks to be loaned by libraries. Their ebooks are readily available for sale on Kindle.
Nexus 7 (2013)
The same really, I was speaking to the Kindle Lending Library, which has the same Big 6 restriction as local libraries. When it comes to buying books, the Kindle (app or tablet) can't be beat. Google could beat them, if they'd drop some prices and have more deals.