The Kindle is for reading, not re-reading! If the number of times you can accesss the book you've bought and paid for is limited, it wouldn't make much sense to buy any kind of reference book or any book by an author you love, would it? And Amazon doesn't even know how the download works! And there's more bad news: "He proceeded to tell me that there is always a limit to the number of times you can download a given book. Sometimes, he said, it’s five or six times but at other times it may only be once or twice. And, here’s the kicker folks, once you reach the cap you need to repurchase the book if you want to download it again."