I think you have to start there. Then there is the question of how the books are delivered....Kindle can work off wireless . I want something that I can download onto a PC...not sure if you can do that easily with Kindle. It's not a simple decision...much bigger than just which reading device. And of course everything is a moving target....i.e. changes are occurring.
I can do the research, just looking to see if any experts were lurking. Thanx!