TAPA DURA, LIBRO USADO, RECUERDA QUE EL 10% DE ESTA VENTA COLABORA CON FUNDACIONES QUE FOMENTAN LA LECTURA EN ZONAS VULNERABLES. #3 New York Times Advice/How-To Bestseller #7 Wall Street Journal Nonfiction Bestseller “This book is game changing in a way I have never seen in a business book. I learned about myself and gained new insights into the work I’ve been doing for thirty years. It is a spectacular read.” – John Riccitiello, CEO, Electronic Arts