Adding Your Blog to Your Amazon Author Profile via RSS
Go to author central and populate your Amazon Author page with a photo, bio, and blog. You can claim editing privileges on this page by registering with Amazon’s Author Central program: https://authorcentral.amazon.com/ This page is tied to your personal Amazon login.
Once you are on your profile page, click add blog
In the following pop-up window, add the following RSS feed: https://YOURDOMAINNAME.com/blog_feed.xml
Once you are connected you will see this screen: