There are many ways to get your content onto a Kindle. But it's not so simple finding a way that produces satisfactory results. For Mythik Imagination #1, I used an .html template (shout out to Derek J. Canyon "Thanks for the template!") and formatted by hand. It seemed to work pretty well, but is tedious if you have to do a lot of unusual formatting. For instance I needed a lot of italics, so it was a pain to add the many, many, many HTML tags by hand.
My goal was to find a program I could use to write all my drafts, then be able to export to send to the proofreader/editor, then paste in the final locked words, then export to a nicely formatted and professional looking Kindle file, ready for uploading. I think I've found a one-stop method of doing all that, using Scrivener.