Joao P.A. Bastos & Nathan Ida 
Electromagnetics and Calculation of Fields [PDF ebook] 

Intended for undergraduate students of electrical engineering, this introduction to electromagnetic fields emphasizes the computation of fields as well as the development of theoretical relations. The first part thus presents the electromagnetic field and Maxwell’s equations with a view toward connecting the disparate applications to the underlying relations, while the second part presents computational methods of solving the equations — which for most practical calses cannot be solved analytically.