Roger Nye's book comes from real world experiences, his own and others. It reflects a lifetime of study, intellectual thought, and discourse with some of the best leaders and thinkers of our time. The is a guide for mentors because Roger Nye was a beloved mentor to military leaders from cadets to generals. This book has timeless value because it encourages the pursuit of the highest principles and standards. It does this by providing references, resources, and examples that can further expand the reader's understanding and development. Though the content of this book is written for the military leader and commander, it clearly has application and value to the non-military leader and chief executive officer. Having had the opportunity and blessing to be mentored by Roger Nye before, during, and after the writing of this book, I can say that my bias for Roger's work has been validated by my life's experiences.