• Reitz, Milford, & Christy: Foundations of Electromagnetic Theory
• Lorrain & Corson: Electromagnetic Fields and Waves (The standard undergraduate text)
• Barger & Olsson: Classical Electricity and Magnetism
• Jackson: Classical Electrodynamics (The standard graduate text)

Also of use: Gradshteyn & Ryzhik: Table of Integrals, Series, and Products (Academic Press)