Google inside...books
Look out Amazon which launched a similar service recently. According to this Wall Street Journal story (subscription required):
Users can search for Microsoft-related books, for example, on the service, called Google Print, by typing "Microsoft site:print.google.com" into the search-query box. It will pull up excerpts for Microsoft-related books, just like other Web pages that Google's software turns up when it "crawls" the Web. Those book excerpts will be interspersed with other search results in the future, said Susan Wojcicki, Google's director of product management.
The closely held Mountain View, Calif., company wants to provide more-useful information to its users, as well as to its publishers and advertisers, Ms. Wojcicki said. The service is free to publishers and advertisers, and Google said it has no business relationships with any of the parties listed on those book-excerpt pages. The company, which had to receive permission from publishers or business partners to host and display copyrighted book information, declined to say how many publishers it has crafted agreements with.