This classic introduction to electromagnetic fields, thoroughly revised in 1964 and available here in a one-volume edition, includes an invaluable self-contained section on quantum theory. Problems with solutions. 148 illustrations. 1964 edition.
Here's a sample of other books in this Dover category
Introduction to Electromagnetic Theory by George E. Owen Direct approach covers electrostatics of point charges, distributions of charge, conductors and dielectrics, currents and circuits, Lorentz force and magnetic field, magnetic media, Maxwell equations, more. 228 illustrations. 1963 edition.
Quantum Theory of Fields by Gregor Wentzel Written by a pioneer of quantum field theory, this introductory volume explores scalar fields, vector meson fields, quantum electrodynamics, quantization of electron wave field according to exclusion principle. 1949 edition.