The aim of this book is to introduce the readers with the science of electromagnetism. Among the various branches of classical physics, electromagnetism is the domain which experiences the most significant advancements, both in its practical and basic aspects. The quantum corrections which produce non-linear terms of the standard Maxwell equations, their particular form in curved spaces, whose predictions can be encountered with the cosmic polarization rotation, or the topological model of electromagnetism, constructed with electromagnetic knots, are important examples of current theoretical advancements. The book consists of in-depth information which makes it very easy for the readers to comprehend the concepts related to the science of electromagnetism. It also elucidates several industrial applications of electromagnetism, emphasizing on its significance. Therefore, this book serves as a valuable and interesting source of information for various specialists in this field.