Yesterday Google's book search team announced on their blog that the 1.5 million public domain books already available on Google Book Search are now available for the iPhone. Simply point Safari at books.google.com/m. That's a lot of books, but being in public domain means that they were published decades ago. For reference works and nonfiction, that may render them useless. But for timeless works, such as Sherlock Holmes and Mark Twain, if you're into reading these classics, you've now got them in the palm of your hand. Also, the works of the great philosophers will still have appeal.