Welcome to MobileRead, nsxbill, we're happy to have you.
While you are waiting, you can read the manual and be an expert by the time it arrives. Go here for FAQ's, and the downloadable PDF manual and quick start guide.
http://www.amazon.com/gp/help/custom...deId=200127470
Scour the forums, don't hestitate to ask questions, and download some of the free books we have here already formatted for your KDX by our own members.
You'll want the mobipocket (.prc) format.
Enjoy