Emphasizing practical applications, this approach integrates IBM PC BASIC programs and numerical techniques with the principles of engineering electromagnetics. This book discusses on-line parameters by numerical techniques and inserts a section on capacitance, conductance and inductance.
Its main idea is how to use electromagnetism in engineering so that it doesn't explain the details about why the equations is that. If you want to know the concept more, then I recommend Griffiths' EM book.
Electromagnetism concepts is not all just "physics". Some ideas are about engineering. You can see those things in this book.
Its math trick is not difficult (Griffiths book's math is very beautiful).