The gap in the extensive literature on the subject of electromagnetic fields between abstract theory on one hand and its simplified, illustrative interpretation and application in practical examples on the other hand led the author, over many years of teaching, to develop the idea for this book. In theory-oriented books for the academic field, the closed description of the complete, mutual connection of electric and magnetic fields through Maxwell's equations is the focus. Therefore, when considering individual types of fields separately (e.g., the electrostatic field), they can easily be recognized as a special case of the broadly applicable Maxwell's equations, thus limiting the risk of misinterpreting them as independent phenomena from the outset.