[PDF] Classical Electrodynamics Julian Schwinger, Lester L. Deraad Jr., Kimball A. Milton, Wu-yang Tsai, Joyce Norton

Schwinger might have been a great physicist, but his style is “anti-Feynman”. Feynman strives (usually successfully) to get to the (physical) point, Schwinger buries the subject in a morass of formalism, which obscures both the mathematics and the physics (I should say that I am a mathematician, so maybe this book is good for physicists…).