An addition to the “Wiley Survival Guides in Engineering and Science” series, the book Fiber Optic Essentials provides an overview of the technology. It discusses the development of low-loss optical fibers, which led to the application of lasers in communications systems supported by a global network of the fibers under seas and over land. The 255-page resource provides a basic discussion on light waves and addresses nonlinear fiber optics, fiber Bragg gratings and fiber-based sensors as well as Raman fiber amplifiers, fiber optic components and pulse dispersion in single- and multimode optical fibers. K. Thyagarajan and Ajoy Ghatak; John Wiley & Sons Inc., Hoboken, N.J., 2007; $79.95.