In the beginning there was ether. Then Maxwell discovered his wonderful equations and Einstein, drawing inspiration therefrom, discovered Relativity. There was no longer an ether. Thank God! For, before, every electric, magnetic and optical phenomenon was supposed to be explained by properties of this ubiquitous ether. For a brilliant account of the physics of the ether, read "Aether", by Maxwell himself, at the Encyclopaedia Britannica (not the present edition: go to* and look at the Classics). Since Lorentz it became fashionable, and sensible, to, first, derive all properties of the electromagnetic fiel in vacuum, and, then, to introduce matter and the complications which appear (and which give rise to most of the beauty of the world). This wonderful book deals with these complications, and shows the beauties that come out of them. This is a high class text, the reader being supposed to know all of basic physics, including, of course, quantum mechanics. Thermodynamics is used lavishly for static or quasi-static situations, providing depth and cohesion. Did you know that you cannot, in this age of new materials, concoct one with electric permittivity (the familiar epsilon) smaller than one lest you violate the second law of thermodynamics? The chapter on electromagnetic waves is superb, with the best treatment of light dispersion to be found anywhere. Did you know that you cannot produce a transparent material which would disperse light in a different sequence of colours than that of the usual glass prism lest you violate causality? You have to read this book. Grab your copy while you can find it. One never knows.