Originally Posted by Blossom
I think that's a little incorrect. It's been working that way with my K3 and my K4 since last October. I don't why it can't work that way on the KF.
You missed the point of his/her post. What he/she means is that Amazon did not implement this feature, whether it be on a K3, K4 or Fire, for the primary purpose of side-loading books not purchased from Amazon.