It gives me two choices: I can read either in Cloud Reader / in the browser or via Whispernet on the Kindle device.
Is there a way to get the actual .MOBI file from the Cloud Reader without having to resort to Whispernet? It would be helpful. Heck, it's a public domain book for $0 I just want to see how it looks like.
I also managed to extract a $0 .MP3 from Amazon.com though it was not the most trivial issue.