The book "Principles of Psychology, Volume 2" was written by the outstanding American psychologist and philosopher William James. In this work, the author continues the study of various psychological phenomena, examines the issues of consciousness, perception, thinking and other aspects of the human psyche. The book consists of two volumes, and the second volume is the final one in this edition. The leitmotif of the work is the establishment of basic principles and regularities that determine the functioning of the human mind. Due to the deep analysis and intellectual insight of the author, the book is considered a classic work in the field of psychology and philosophy. "Principles of Psychology, Volume 2" will benefit not only specialists in the field of psychology, but also anyone interested in the study of the mind and human behavior.