Hi
Thanks for this new thread. I just bought a PW3 mainly for using it with Koreader once jailbreaked and I really don't know this amazing "Amazon world".
I would like to use an example (in French). Here is a quite interesting offer for some ebooks which received recent literary prices. I do not know if it applies for Premium customers or average ones. The question is about
formats.
This is the
offer for you to peruse:
The ebooks are said tersely to be available in "Kindle formats". What's that?

If I own an old Kindle, I can read Mobi files. A more modern Kindle will be able to read azw3 format - or kf8 to be clear

. My brand new PW3 seems designed for the mysterious and brand new kfx.
Could some knowledgeable person explain me how it works? Could I receive different formats if I order them from my Kindle or from a PC application (which I do not have because I am a Linux user).
How Amazon intends to deal with possible incompatible formats?