This book is a must-read for leaders struggling with subordinates who are reluctant to speak up even when they have something important to say or ask. The author, who has studied psychology in the U.S. and has over 14 years of extensive experience as a communication coach at top companies, reveals the truth of assertiveness. The book is full of practical know-how about how to help team members manage their own mindset growth without making them dependent on the leader. This book opens the door to sustainable assertive development that is not a temporary fix.