This important book serves as a transition between introductory courses in electromagnetism and realistic concepts employed in the microwave industry. Topics on lossy, multiply connected and ferrite networks are discussed in a simple and direct style to arouse the interest of the novice student, enhance the analytical skills of the practitioner, and invite the perusal of the advanced student to explore the novel concepts developed in the book. In particular, the discussions on ferrite networks are presented as an integral part of the author's theoretical methodology rather than a specialized presentation or an addendum to the book.