I have a Kindle with many ebooks on it. I would like to back them up onto my desktop. I have a cable that will go from my Kindle to USB, but I don't know how to do this. Thank you in advance for all of your help.
The Kindle Fire does not automount in Ubuntu 12.04. The dmesg tail does not show any usb storage when Kindle is plugged in. Install package mtp-tools and mtpfs
Make a directory under /mnt named mtp
Plug in the kindle and mount it
Your kindle files should now appear under /mnt/mtp Browse for your books and just copy them off. I forget exactly where they were, maybe under /mnt/mtp/kindle Unmount the kindle (or command fusermount -u /mnt/mtp )
Method 1: Install Kindle reading app for PC. Then log in with your own Kindle account. You will see all your purchased kindle files are synced to this kindle app on your desktop.
Method 2: Copy your kindle file to your desktop. But as your kindle files are protected with Kindle drm, and they are kindle format (azw3, azw, mobi, prc, etx), but not common epub or pdf, so you need to convert kindle to epub or pdf and remove kindle drm. Then open them on desktop with any reading app.
Tips: If with method 1 you can only read your books with Kindle app.