This link explains how book lending works with their Kindle e-readers.
When Amazon started selling Kindles with this option they were by far the largest book seller in USA giving lots of leverage with book publishers. Only a small percent of Amazon books are available for lending. I think the book publishers authorizing limited lending think of book lending as promoting book sales.
http://www.amazon.com/gp/help/custom...deId=200549320
Soon after Amazon book lending began this site made it easier to borrow a book from a lender. Great for customers and further disincentive for publishers to authorize e-book lending.
http://www.booklending.com/
Many things I don't like about DRM but authors deserve opportunity to profit and make a living from their work and so do publishers.
This link is debate about how can the music biz be FIXED. Much of it applies to book authors.
http://www.theregister.co.uk/2012/10...ate/page2.html
http://www.theregister.co.uk/2012/10...ate/page2.html