I too used a handful of different programs while writing my book (including emacs) and ALMOST wrote my own software too, as there was nothing that "just worked"

I too used a handful of different programs while writing my book (including emacs) and ALMOST wrote my own software too, as there was nothing that "just worked" the way I wanted. In the end, I looked at what was the easiest way to get it published onto Kindle and stuck with that. This ended up being Microsoft Word. On a side note, have you had your drafts proof read by anyone? Getting feedback on your writing can help you get to the next draft. Keep doing this process until you publish.