I have a Kindle 6" and a Kindle Paperwhite and a Tab. Anything you purchase thru Amazon will be available on any device. But, I believe they limit you to having it only 2 devices at the same time. I had a book on both Kindles and when I tried to pull it down on the Tab it said I had exceeded the max number of copies allowed. So I deleted it from one Kindle and all was well. So the answer is Yes! But with a few exceptions. Hope this helps.