Michael C. Keith ranks among the most prolific authors on the subject of broadcast media, in particular radio. He is senior lecturer of communication at Boston College and is the author of over a dozen books, including Voices in the Purple Haze, Signals in the Air, and the classic textbook, The Radio Station. In addition, with Robert Hilliard he has coauthored Waves of Rancor and The Hidden Screen for M.E.Sharpe, as well as several other titles. He is also the author of numerous journal articles and has served in a variety of editorial positions, including that of coeditor of the M.E. Sharpe series, "Media, Communication, and Culture in America." He is past chair of education for the Museum of Broadcast Communications and a former broadcaster.