Google is digitally scanning books and then including that content in their search index. Depending on any given book's copyright restrictions, users might be able to view anything from the full text of a book to just a brief excerpt and/or bibliographic information. Check it out.
We're a great fan of Google and their portfolio of products, but you still have to scratch your head at the company's market capitalization - $72 billion. Goldman Sachs is still beating the drums for Google stock. Consider the source. People are gonna get burned on this one.