The book "Human genius" by the famous Italian doctor and criminologist Cesare Lombroso is a study about the nature of genius and exceptional mental potential in a person. The author examines the properties of geniuses of different eras and cultures, separating their characteristics from ordinary personality properties. Lombroso analyzes both the physiological features of geniuses and their mental essence, trying to find out where the talent and creative potential of great minds originate. This book helps to better understand the nature of genius and its role in human development.