Any good books about leadership?

There's no better series of books on leadership than those written by Jocko Willink. Retired Navy SEAL Commander that served in the war in Iraq, who's unit was the most decorated. The American Sniper Chris Kyle's Commander. It really doesn't. It straight to the point and doesn't have any military stuff that would confuse you. The books are very well written. Extreme Ownership is the one you should start with. The format is as follows: It brings up a principle, then it details in example of an actual moment it was applied in Iraq, then it details how it was applied on the civilian side from working with companies via his leadership consultation business. It's rsally good stuff, and you cannot go wrong with it.