HBR's 10 Must Reads on Strengthening Your Soft Skills (with bonus article "You Don't Need Just One Leadership Voice--You Need Many" by Amy Jen Su)

The 48 Laws of Power

The Laws of Human Nature

HBR's 10 Must Reads on Leadership (with featured article "What Makes an Effective Executive," by Peter F. Drucker)

The 10X Rule: The Only Difference Between Success and Failure

HBR’s 10 Must Reads on High Performance (with bonus article "The Right Way to Form New Habits” An interview with James Clear)

Awaken the Giant Within: How to Take Immediate Control of Your Mental, Emotional, Physical and Financial

Self-Awareness (HBR Emotional Intelligence Series)

The Daily Stoic: 366 Meditations on Wisdom, Perseverance, and the Art of Living

HBR's 10 Must Reads on Emotional Intelligence (with featured article "What Makes a Leader?" by Daniel Goleman)(HBR's 10 Must Reads)

Mastery

HBR's 10 Must Reads on Managing Yourself (with bonus article "How Will You Measure Your Life?" by Clayton M. Christensen)

Ego Is the Enemy

Empathy (HBR Emotional Intelligence Series)

Big Magic: Creative Living Beyond Fear

Resilience (HBR Emotional Intelligence Series)

Outwitting the Devil®: The Secret to Freedom and Success

HBR's 10 Must Reads Boxed Set (6 Books) (HBR's 10 Must Reads)

So Good They Can't Ignore You

HBR's 10 Must Reads on Managing People (with featured article "Leadership That Gets Results," by Daniel Goleman)