WHAT IS GOOGLE BOOK SEARCH?
Book Search works just like web search. Try a search on Google Book Search or on Google.com. When Google finds a book with content that contains a match for your search terms, they link to it in your search results.
If the book is out of copyright, or the publisher has given permission, you'll be able to see a preview of the book, and in some cases the entire text. If it's in the public domain, you're free to download a PDF copy.
Google has created reference pages for every book so you can quickly find all kinds of relevant information: book reviews, web references, maps and more.
If you find a book you like, click on the "Buy this book" and "Borrow this book" links to see where you can buy or borrow it. Currently, Google is connecting readers with books in two ways: the Partner Program and the Library Project.