Originally Posted by pilotbob
Kindle is mobi (99% of the time. .azw1 is Topaz). So calibre will convert Kindle to LRF as long as you have deDRMed it.
If you have a mobi book it will work fine on your Kindle with no conversion as long as it has no DRM on it.
This is good to know--but I assume that there is still the problem of buying from Amazon in the first place, for which you need to have a registered Kindle? Or is there some way around that?