The Official Google Mobile Blog has revealed that over 1.5 million public domain books in the US and over half a million outside of US are now available to be searched and read on iPhone and Android devices..
You just need to go to books.google.com/m in your mobile browser. Then you can search for a title, author, or subject. Or you can browse the list of “Featured books” and various categories like business and economics, the classics, travel, and more. Once you’ve picked out a book or two, you can easily get back to your selections by clicking on the “Recently viewed books” under the “My books” section.
Reading the books on the phone is also painless. This is done by extracting the text from the page images so it can flow on your mobile browser just like any other web page. Google accepts that the service is not bug free and promises to carry on with the enhancements in the future.