I found "From Worst to First" by Gordon Bethune quite good. Talked about turning around Continental and discusses numerous aspects of the business that needed change. You can apply parts of the book to just about any aviation organisation.
"Nuts" by Freiberg discusses Southwest Airlines, which has a huge focus on its people. A little wacky - the culture wouldn't work everywhere - but still a good read.
Both explore the importance of staff and communication. Unfortunately many people in management (not just aviation management) forget about this.