Last night I have a question “how to read book with iPhone?” then I try to search with google to find the answer. wallaaaa… yeah I found the answer at iphoneapplicationlist

More than 20,000 books, novels and articles optimized for iPhone reading for FREE!
Users can also add and share personal notes on any of the pages they are reading–a unique feature that gives multiple readers the opportunity to read same book and exchange comments.

To read read the book on your iPhone open the link in Safari:http://www.textonphone.com/

Thanks bro..