Dmitry Sokolov's book is not conceived as a study of the world of physical phenomena, but in many ways as a saga about science itself. By talking about magnetic fields, the author seeks to show how and why physicists work. How do the magnetic fields of distant stars work? Where do they come from, how do they differ, how and what do they affect? How can the Earth's magnetic field be changed and what are the ways to observe it? What is the phenomenon of the Kursk magnetic anomaly? What is the structure of the magnetic fields of spiral galaxies and the Sun and how are the magnetic cycles that scientists have been trying to track since ancient times related to them? The answers to these and many other questions are accompanied by entertaining stories from the lives of scientists and the history of domestic and world science.