This. You may have to authorize a particular e-mail address to send e-mails to your Kindle address, however - but this is simple to do in Amazon settings as well.One easy thing to do to get your files onto your Kindle:
1. Go to Amazon -> My Account -> Manage my Kindle
2. Click on 'Manage My Devices' from the sidebar
3. Your Kindle has an e-mail address assigned to this - xxx@kindle.com. Copy this address.
4. E-mail the .mobi file from Fantastic Books to this e-mail address and it will be wirelessly loaded onto your Kindle.
No fuss in connecting up your Kindle this way, just an easy e-mail to send.