LENDING LIBRARY: Amazon.com Inc. will let Kindle owners borrow one electronic book per month.
THE REQUIREMENT: Borrowers have to subscribe to Amazon's Prime service, which provides free two-day shipping and streaming movies for $79 per year. The books also require a Kindle device, even though there are Kindle apps for phones, PCs and tablet computers.
HOLDOUTS: The six biggest publishers aren't participating. The "Big Six" have fought with Amazon over whether the publisher or Amazon gets to set the retail price of books.