“Immunity to Change” has been one of the most influential texts in my own practice as well as in the popular translation of developmental theory. Two of my colleagues, Harvard psychologists Bob Kegan and Lisa Lahey, illustrate how our individual beliefs and organizational mindsets combine to create a natural, but powerful immunity to the improvements and changes we want to make. This book proposes a psychological model and developmental method for uncovering these immunities and offers powerful questions to overturn those resistances so we can actually change. Since its publication, this book has exploded into certifications, workshops, online courses and coaching methods used in organizations all over the world. I read this book and dove into this practice long before I ever taught Bob at Harvard or consulted for their consulting firm, Minds at Work. This book is a top 10, all-time pick for me and practitioners I most respect.