Thanks, you should check out Book Creator. I think it does the same things you are doing but it automates the process. Book Creator does have the option to save your books into different formats but I always choose to save as an HTML file and import it into Calibre. Thanks for the tips on how to get the TOC to work with the Mobi files I have created. I could never figure that part out before.
https://www.mobileread.com/forums/sho...ht=bookcreator