Jocko's Extreme Ownership and Leadership Strategies and Tactics are also very good. I would also recommend The Goal by Eliyahu M Goldratt as an excellent prime

Jocko's Extreme Ownership and Leadership Strategies and Tactics are also very good. I would also recommend The Goal by Eliyahu M Goldratt as an excellent primer on the Theory of Constraints as an effective management philosophy. Most people recommend The 7 Habits of Highly Effective People and other books in that ilk, but I've found far more value in these three books alone than every other management theory book I've read, combined.