Unlike many other undergraduate textbooks on electrodynamics, this work by Ohanian (U. of Vermont) incorporates Einstein's relativistic recognition that electric and magnetic fields are not different entities, but are instead merely different aspects of the four-dimensional field tensor. After following the traditional introductory road in opening chapters on vector calculus, electrostatics, the boundary-value problem, dielectrics, and electric energy, he takes "a sharp turn into the relativistic domain" by presenting chapters on he theory of special relativity, vector calculus in spacetime, and the relativistic understanding of Maxwell's equations. Remaining chapters explore application's of Maxwell's equations to the areas of magnetostatics, electromagnetic induction, magnetic dipoles and magnetic materials, electromagnetic waves, radiation by a point charge, radiation by a system of charges, resonant cavities and waveguides, and scattering and defraction. Annotation ©2007 Book News, Inc., Portland, OR (booknews.com)