Kindle App v3.9.2.52 from BB World, BAR download here...
Since us Q10 users haven't gotten any love from Amazon yet, I figured we should at least be able to load the same version that is available to the Z10 users from BlackBerry World.
So here ya go, no need for debug signing or any of that, just sideload and go :
https://mega.co.nz/#!fI5BFYrD!e3MzoX...DyNHTLWnhZE49I
EDIT:
Here's a mirror location to grab this application from as well, it's a Box.com link :
https://www.box.com/s/k5kj2zxddasx5lfhq3hj (The Kindle app is : KindleForAndroid-3.8.2.52-Blackberry10.bar)