Kendall uses .pdf right?
I’d back up anything on it, especially now that you know they can remotely access your files, read them, and delete them.
Hell, I’d burn the thing.
Kindle can read pdf (and word, and text, and ebook... among other) files, but the books that Amazon sells are in their own format.
I love the Kindle. It's gotten me back into regular reading because it's so easy to always have with me. I've gone from reading just a few books a year to over a dozen books in just the last few months. I like to read two or three at a time, like some Sowell and then some Heinlein, depending on what I feel like reading at the moment. This way I've got them all with me all the time. Any time I've got a few minutes I can pick it up and keep reading.
I also like the built-in dictionary. If you're not sure of a word you can just highlight it and get the definition.
By the way... anybody that hasn't read Sowell's "Housing Boom and Bust" book-- get it. It's gonna really enrage you. :-)