A technologist at work has asked me to recommend him a book for understanding the rudiments of electromagnetics. From my university days, I learnt all my EM theory and applications from my lecture notes and the Serway and Beichner book, sadly these texts are a little heavy going for the technologist.

Can anyone recommend a decent book, e-book or website that would give a good rudimentary introduction to EM theory and applications, aimed at someone without and engineering background? The technologist has a decent grasp of mathematics so some maths is acceptable (I don't think he'd appreciate pages and pages of calculus though!).

Dave