I've got a 3rd generation Kindle. It's over a decade old, but it works flawlessly <i>except</i> that it can't authenticate with Amazon anymore, due to changes in their whatsits. So, it's not possible for me to legally buy books from them, which (according to me) gives me license to just pirate everything I want. Nobody will believe this, but I do buy physical copies of about 90% of the books I steal, if only used copies. But Amazon doesn't get a dime from me anymore.<p>I bring this up to mention how incredibly easy it is to sideload books into a Kindle (an old one at least; can't speak to the new ones).