Bosort's book "Ferromagnetism" is a fundamental monograph, which consistently considers all the main practical results of the modern doctrine of ferromagnetism. In a simple and visual form, theoretical ideas about the most important phenomena and processes are presented , occurring in ferromagnetic metals and alloys, a large place is occupied by the description of numerous magnetic alloys , Their properties , Characteristics, Phase Equilibrium Diagrams , Methods of obtaining , processing and t. p. The book is provided with extensive bibliography. The book is designed for physicists - scientists and engineers, both engaged in research in the field of ferromagnetism, and dealing with the production and use of magnetic materials. It can also serve as a good guide for graduate students and students studying magnetism and metal physics.