"Self-Esteem Lessons" is an empathetic and insightful novel that explores the concept of self-esteem. The author, Dr. Yoon Hong Gyun, draws on his clinical experience and personal life story to explain how self-esteem can be learned, lost, and regained. Through practical exercises and concrete examples, the book highlights the invisible wounds that arise from interpersonal relationships, fears, and dependencies. It offers readers valuable insights to develop a healthier relationship with themselves. Rather than judging or sugarcoating, the author conveys the message that self-esteem is not innate but must be learned and nurtured. This book is aimed at anyone who wants to learn to appreciate themselves more.