Authors and publishers have gotten their underwear all tied up in knots over Google Book Search, which lets people do a search for a particular topic, then scan the full text of books that are related to it.
When Google finds a book whose content contains a match for the search terms, it links the book to your search results.
Book marketing genius John Kremer offers a convincing 2-minute video in which a small publisher tells the story of huge increases in book sales thanks to Google Book Search.
To see the video, scroll about three-fourths of the way down this page and look for the headline “Google Book Search: It helps sell books!”