This advanced undergraduate- and graduate-level text by the 1988 Nobel Prize winner establishes the subject's mathematical background, reviews the principles of electrostatics, then introduces Einstein's special theory of relativity and applies it throughout the book in topics ranging from Gauss' theorem and Coulomb's law to electric and magnetic susceptibility.
Here's a sample of other books in this Dover category
Molecular Quantum Electrodynamics by D. P. Craig, T. Thirunamachandran Self-contained, systematic introduction examines application of quantum electrodynamics to interpretation of optical experiments on atoms and molecules and explains the quantum theory of electromagnetic radiation and its interaction with matter.
Classical Field Theory by Davison E. Soper Geared toward advanced undergraduates and graduate students, this text offers an accessible approach to continuum mechanics, electrodynamics and the mechanics of electrically polarized media, and gravity. 1976 edition.