[froskur]

Re no 2. I believe the Calibre plugin DeDRM does what you want. It's been a while since I used it, but iirc you will need to have a Kindle registered with the Amazon account you used to buy the book for it to work.

[kerkeslager]

I don't have a Kindle, so...

[jpindar]

There is a Kindle reader for the PC, you could try that.