The exploration of the terahertz region of the electromagnetic spectrum has gained considerable momentum in recent years and offers exciting opportunities for research and development. This book meets the need for a textbook that introduces students to this burgeoning field. First and foremost, it is about the fundamentals of physics. The author provides a careful explanation of basic concepts and their associated mathematical formulations. Attention is then given to key features which emerge in the terahertz regime. Lewis addresses the reader directly, which is a novel and refreshing way to present the material. This book is suitable for self-study, so it may also be useful for those outside the target audience. Its utility is enhanced by the fact that the author has succeeded in capturing the essence of the topic in fewer than 300 pages. 

Review by K. Alan Shore, Bangor University, School of Electronic Engineering, Bangor, Wales, United Kingdom.

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