@Gwen,
Of course you are using the Kindle Collections plugin too, right? Compulsory as a Kindle owner I would have thought.
Oh, and the Plugin Updater plugin to make sure you easily pickup the updates...
To answer your request. There is a couple of threads/posts you will want to take a look at. First this post:
https://www.mobileread.com/forums/sho...&postcount=137
Then this thread:
https://www.mobileread.com/forums/sho...d.php?t=123179
I would try on those threads (or the forum they are in) if you want to head down that path. I have never tried it myself so can't vouch for how well it works, limitations etc but I am sure pchrist7 will be happy to help you out with that if you post there.