I'm not much of an ebook reader, but since Chris Anderson's latest book "Free" is free for a limited time on Amazon for Kindle, I decided to give it a try.

I don't have or desire to have a Kindle, but Amazon's free Kindle for iPhone App (iTunes Direct Link)  works fine.  It's simple, download the Kindle App, sign in with your Amazon account and then search for "Chris Anderson Free".  Click to download and you're all set.
Here's what a sample page looks like on the iPhone screen.