Here you can find lists of great Electromagnetics books are or have been used to teach courses at Stanford.
By: Allen Taflove, Susan C Hagness
By: Matthew N.O. Sadiku
By: Eikichi Yamashita
By: Roger F. Harrington
By: Andrew F. Peterson, Scott L. Ray, Raj Mittra
By: Giuseppe Pelosi, Roberto Coccioli, Stefano Selleri
By: Konada Umashankar, Allen Taflove