Amazon wants people to try its new Kindle devices really bad. It is running a deal that lets you try a Kindle Paperwhite, Fire HD 7, or Kindle Fire HDX 7″ for free for 30 days. There is a one device per customer limit as far as this deal goes. You will get charged automatically after 30 days. If you don’t like it, just send the device back, and you won’t have to pay anything extra. Unfortunately, not all Kindle devices seem to be covered.