Book of Secrets of Personality Science and Development – Mohammed Al-Khalidi If you like to understand people more and develop your personality, this book will appeal to you. It talks in an easy and direct way about personality types, how to discover your strengths, build greater self-confidence, and deal with others intelligently. The book is full of simple ideas and exercises that help you understand yourself and those around you more deeply and develop your communication skills and ability to handle different situations. Condition: Very clean