Successors to this book? That is, books that are less mercenary, more up-to-date culturally, heavier on insight and lighter on separate rules. I guess one would be Steven Covey's 7 Habits. But, with more hands-on, with nitty-gritty and depth, about motivating people and perhaps, also, covering defense. If David Deida (of 'Way of the Superior Man') had written something on the subject I'd go for it. Probably it'll need multiple books.