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

HBR's 10 Must Reads on High Performance, Updated and Expanded (featuring "Nine Things Successful People Do Differently" by Heidi Grant)

The Laws of Human Nature

Mastery

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

Ego Is the Enemy

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

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

Self-Awareness (HBR Emotional Intelligence Series)

The Let Them Theory: A Life-Changing Tool That Millions of People Can't Stop Talking About

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

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

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

The Daily Laws: 366 Meditations on Power, Seduction, Mastery, Strategy, and Human Nature

Empathy (HBR Emotional Intelligence Series)

The $100 Startup: Reinvent the Way You Make a Living, Do What You Love, and Create a New Future

Resilience (HBR Emotional Intelligence Series)

Think and Grow Rich Every Day

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