Google Print is still in Beta, but this upcoming service will be yet another way to make your book ‘search engine friendly’. Google’s description of this tool:

Google’s mission is to organize the world’s information, but much of that information isn’t yet online. Google Print aims to get it there by putting book content where you can find it most easily – right in your Google search results. Just do a search on the Google Print homepage. When we find a book whose content contains a match for your search terms, we’ll link to it in your search results. Click a book title and you’ll see the page of the book that has your search terms, along with other information about the book and "Buy this Book" links to online bookstores (you can view the entirety of public domain books or, for books under copyright, just a few pages or in some cases, only the title’s bibliographic data and brief snippets). You can also search for more information within that specific book and find nearby libraries that have it.