NYT:

"Executives at Amazon.com are negotiating with several of the largest book publishers about an ambitious and expensive plan to assemble a searchable online archive with the texts of tens of thousands of books of nonfiction, according to several publishing executives involved.

Amazon plans to limit how much of any given book a user can read, and it is telling publishers that the plan will help sell more books while better serving its own online customers."

It's all about the search engine.