Unlock the One BIG Idea That Can Transform Your Leadership.

What separates exceptional CEOs from the rest? It isn't access to more information-it's access to better judgment.

In 40: The One BIG Idea Innovative Leaders Use to Create Transformational Change, Dennis Sullivan reveals why today's most successful executives rely on peer-to-peer learning to solve complex challenges, make smarter decisions, and drive lasting organizational success.

Drawing on leadership research, real-world executive case studies, and decades of business experience, this book explores why traditional executive education often falls short and how collaborative learning among trusted peers becomes the catalyst for innovation, strategic thinking, and transformational change.

Inside, you'll discover:

• Why executive judgment matters more than knowledge.
• How CEOs learn through experience, reflection, and trusted peer dialogue.
• The power of confidential CEO peer groups.
• Proven strategies to improve decision-making and leadership effectiveness.
• Real-world examples from global business leaders and executive forums.