OSoft is now selling Java Network Programming, 3rd edition in ThoutReader format. I played around with this a little. There's the seed of a good idea here, but only a seed. The implementation is faulty. It's vastly too difficult to purchase and install content, even the free content. Furthermore both the web site and the client software make a number of basic GUI bloopers. Finally the client isn't integrated enough with the server. You can't browse and install content directly into the client like you can buy songs in iTunes. Instead you have to purchase and download the new books, then install them manually. This should be no more than a two-click operation.