Kindle Books Updates:
If you’d like to automatically receive updates to your Kindle books that we have confirmed improvements were made in, you can turn on automatic updates for your books from the Manage Your Content and Devices page.
Before you enable the Automatic Book Update feature, make sure Whispersync for Books is turned on for your device or supported Kindle reading app to sync your notes, highlights, bookmarks, and furthest page read. Whispersync for Books is enabled automatically on Fire tablets and can’t be turned off.
To enable Automatic Book Updates:
1. Go to Manage Your Content and Devices (www.amazon.com/mycd).
2. Select the Settings tab.
3. Select “On” under Automatic Book Update.