Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Excellent introduction to EM w. emphasis on tubes and slices

The book provides an excellent introduction to both the foundations of electromagentic theory, building up to complex analysis including wave guides and other transmission effects. Starting in a manor accessible to virtually any reader, the book provides great emphasis on the tube and slice analysis techniques using a style which makes an otherwise dull area a joy to read. The only university text I've actually read cover to cover non stop.