Originally Posted by Manichean
Did you properly set the cover image in the books metadata (or pass it along as an argument when using the CLI tools)?
I think I properly set it in the books metadata. I see it in Calibre. I also see it when I drop the mobi file onto my Kindle for Mac icon. It goes into my library with the cover. But when I email the same file to my Kindle, the cover doesn't come along. I don't understand your other question in parentheses. I wish I did! Hahaha!