"Magnetic Susceptibilities" as they appeared to me - An Amperian approach

Starting from scratch, the book narrates a systematic story of the basic ideas you need for understanding “quasi static magnetic susceptibilities”. The story leans on the author’s 25 year experience measuring susceptibilities following the Faraday technique (related with solid state physics, radiation effects, materials and magneto chemistry). The base of magnetism, the current-current interaction, is the linkage between the topics treated. The number of mathematical equations are reduced to a minimum and can be skipped without losing the thread of the story. The story is positive towards the sound bases of magnetism. However, room is left for the interpretation of measuring data. As the word “susceptibility” covers different meanings, the story answers for different situations the question: “what is susceptible to what for creating what?