How to Turn On DLC?

To get automatic updates on DLC novels, you simply need to enable the feature in your Kindle Account.

You can do this by going under the Settings tab, to Manage Your Content and Devices and clicking on Automatic Book Update.
https://www.amazon.com/mn/dcw/myx.html#/home/content/booksAll/dateDsc/
Automatic Book Update: On.

These instructions work for all of your Kindle books. It’s a good idea to have the option on in general, as we regularly update our works.