The ever increasing number of applications of electronic devices (that must be designed to properly operate in the presence of an EM disturbance while not introducing intolerable EM emissions) necessitates quantitatively describing their mutual EM behavior. This is exactly the main theme of the book that is, generally speaking, all about EM interactions between such devices. Accordingly, the book covers a general reciprocity-based description of multiport antenna systems, their EM scattering properties, mutual EM coupling, EM compensation, their equivalent Kirchhoff-network representations...