I downloaded Scrivener and another one and I can’t understand either, haha. I’ve self-published 10 books from MS Word. And, I’ve heard so much about the other programs. I will try the one you mentioned in the piece. I’d like to write more books too. But Medium takes all my time. The book writing takes a lot of time upfront but once the writing is done after edits, the writing is usually done. I like that aspect of book writing.