Book excerpt: Long recognized as a classic in the field, this book offers comprehensive coverage of radio waves in stratified media. Well-known authority James R. Wait guides you through a broad range of physical problems using a wealth of experimental data that is particularly relevant to current studies of radiowave transmission in both terrestrial and extraterrestrial environments. Electromagnetic Waves in Stratified Media features a clear explanation of the Mode Theory of wave propagation, complete with supporting physical examples; a concise analysis of modes, rays, and their equivalencies; thorough coverage of asymptotic (high-frequency) developments; applications to telecommunications for frequencies from ELF to SHF (10 Hz to Gig Hz); and much more. It is a must-have book for every engineer in the field.