The book definitely is not done. When you're formatting something for Kindle, it basically amounts to making changes to the spacing. Amazon has an easy to follow guide on how to do it. Ideally, you set up the spacing correctly before you begin writing so you don't have to worry about anything. If you don't, when you manually set the margins everything essentially ends up getting indented twice, once from the auto format and then again because of the manual indents. All you have to do is go through and delete the manual indents. Even for longer projects, it doesn't take that long to do. The only other thing I could possibly think of is he has to manually insert page breaks between chapters and delete excess space if he was manually hitting enter a bunch of times to create a break.
Even for someone as dumb as Russel, these are changes that would only take an hour or two tops.