A group of the greatest British psychologists participated in this book, and they shared its topics according to the specialization of each one of them, thus creating an authoritative and trustworthy book. What appeals to this book among general readers is that it was not written for specialists. This book is devoid of difficult problems and complex terminology, and its style is easy, so it does not need any trouble with its discussion of the most important issues that run through the mind of every human being, and affect his thinking, feelings, emotions, and, in short, his psychological state. One of the major questions that this book answers is: How does the adult mind work? How does a child's mind work? Through this book, you can learn how a person studies his mind, the power of the subconscious and dreams, what mental fatigue is, and even how cinema affects us, how complex the process of realizing artistic beauty is, and what weakens our nerves? There are many topics and questions that we all think about and for which we do not know a real scientific answer. We promise you, dear reader, that you will learn a great deal about yourself as you read this unique and valuable book.