Google Books on my iphone

Wow, so now I can access google books in a format optimized for my iphone: http://www.theiphoneblog.com/2009/02/05/google-books-optimized-iphone/. I have downloaded books through the app store, sometimes free, usually for a modest price, but now I can read anything available in the full google books site on my phone for free. For example, I am reading Swiss Family Robinson for a class. I have the paper copy, but just this morning I was searching the app store for a copy so that when I have a few minutes I could pull out my phone and read a bit. I couldn't even find a version in the app store, paid or free, and in a couple of minutes I found and opened the unabridged text in google books and can read it whenever I choose. Cool.