Google's New Book Search (Beta)

An interesting new online tool is Google's new Book Search. Here is how Google describes it:

Just do a search on Google Book Search or on Google.com. 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, like a card catalog entry, some basic information about the book. You may also see a few snippets of text from the book showing your search term in context. If the publisher or author has given us permission through our Partner Program then you'll see a few full pages from the book and if the book is out of copyright, you'll be able to page through the entire book. In all cases, you'll see links that lead directly to online bookstores where you can buy the book.