
There are several methods for either avoiding or handling KFX format. Unless additional steps are taken, these books will fail to convert in calibre with the error: "KFXError: This is an Amazon KFX book. Each book will appear in a separate subdirectory of the "My Kindle Content" folder with a file extension of ".azw".


The Kindle for PC and Kindle for Mac programs use Amazon's KFX format for most books. There is also a new method (#6) using an old version of the Kindle for Android app described here.

(Details in this thread.)This means that methods 1, 2, and 4 described below are no longer effective for those books. Important update: Amazon has made a change to their service so the books published since can no longer be downloaded using Kindle for PC or Mac versions prior to 1.39.
