Windows Live Books is Microsoft’s online search service for books. The service will give information seekers a distinctive, powerful set of tools for finding answers to their questions through the discovery of trusted book content—and provide publishers with a new way to connect with potential customers.

As publishers, you add your content to Windows Live Books through the Windows Live Books Publisher Program. Participation in the program is free, and it takes just a few simple steps to sign up. Once you've submitted your books, WLP will handle the rest: It will scan your books, index them, and help bring them to the attention of millions of Windows Live Search users. It’s easy and it’s free!

Check it out: http://publisher.live.com/