An outstanding book for anyone, civilian or military. SgtMaj Jacques writes of his military experiences in a really engaging manner, not just a mass of Gun Ho bravado and military jargon. The principles he describes are invaluable for anyone to succeed at any enterprise or task.
I especially recommend "Sergeant Major, U. S. Marines" for the best list of the five rules of leadership. Finally someone who understands that leaders aren't micromanagers. They instill their knowledge and experience to their subordinates in a way that makes that person is engaged and capable of executing the task assigned. That way, the job gets done - they way you've trained the subordinate - and you can move on to other tasks with the confidence that job is covered.
That description is merely a quick glance of the core principles of leadership SgtMaj Jacques illuminates in his book. Personally, since first reading Sergeant Major, USMC years ago, I have to say it was life-changing. Suddenly you understand that a leader isn't all bravado and yelling at people. A true leader is achieves his greatest satisfaction not in doing something his way, but teaching and inspiring others to do the job right. That satisfaction is mirrored in the pride the subordinate takes in being competent, reliable and needed.
Even if your idea of the Marine Corps is a bunch of gorillas in camo, you'll be surprised at the wisdom shared by an outstanding member of what is actually our country's most educated branch. I guarantee this will be one of the best and most engaging self-improvement book you've ever read.
Semper Fi!