According to the Canadian Forces Leadership Institute: "[L]eadership is the art of influencing human behaviour so as to accomplish the mission or task in the manner so desired by the leader."
Don't limit your reading to aviation. While all those books you listed are good, leadership is devoid of context. A leader can tell people what to do and they have to listen or they don't keep their job. What a great leader does is they add in the context so that people want to do what they are told.
Therefore, any book on leadership will help you with your command style. Your knowledge of company and aircraft manuals will put it into the context required.