Or instead of messing with propertiary programs one could set up an rsync job to pull the books from the actual device. DeDRM still required, btw. But do humans really requires a guide how to backup stuff from a frickin' mass storage device? I hate this like the 1000 different "10 hammock mistakes" video on youtube, where all of them telling the same things. Ah, she is member of "Amazon Associates" program so this article is just a bs for more clicks.