Amazon has raised the bar with their new line of Kindle HD tablets. Not content to rest on their reputation as the world's leading purveyor of eBooks, Amazon is giving Apple a run for its money with this series of low-cost, high-performance machines. Whichever model you've chosen, you've just bought yourself an incredibly powerful handheld entertainment device that should cost a lot more than it does: the company is banking on the fact that you'll be using your Kindle Fire HD to find and purchase all kinds of things from Amazon.com. If this is your first tablet experience, it can all feel a little overwhelming: the App Store, X-Ray, Kindle Prime, all of this stuff can sound like science fiction to the uninitiated. Amazon has done their best to make it as easy as possible, heavily customizing the open-source Android operating system for both ease-of-use and reliability. You might get a little confused at first, but with the help of this guide, we'll have you up and running like a pro within minutes. To top it off, we will show you where to get free books.