Some of these are free because they are public domain, like The Prince. Not sure what's up with the others. I've only had a kindle for a few days but it's been

Some of these are free because they are public domain, like The Prince. Not sure what's up with the others. I've only had a kindle for a few days but it's been my experience so far, that if a book is free and not public domain, there is a reason: no one would ever buy it.