The aim of the book and its associated computer disk is to explain the physical nature of electric and magnetic fields encountered in electrical engineering‎.‎ Field problems are inherently difficult because fields are distributed in space and can exist in what is usually regarded as empty space devoid of matter‎.‎ The customary approach to fields problems is through algebraic methods and the solution of equations‎.‎ The book emphasizes instead a method based on geometry which enables the student to visualize the fields‎.‎ Backed by a computer program ‎(‎available to download at the bottom of this page‎)‎ giving visual displays‎,‎ the method enables the student to attempt real problems and to use design methods‎.‎ A comprehensive survey of numerical and analytical methods is provided and examples of engineering applications are discussed‎.‎