"Like the denizens of some brilliant ocean, humans are awash in light. Surrounded by illuminations both natural and artificial, we remain blissfully unaware of how light determines most of life's rhythms and rituals or how it dominates every field of modern science. Michael I. Sobel, a professor of physics at Brooklyn College, has attempted no less a task than to enlighten us (see how it pervades our language) about the many facets of this ubiquitous phenomenon, from its earliest stirrings of emotion and wonder in ancient savants to its modern applications in lasers and silicon chips. His broader objective, however, is to show the unity of the natural sciences by using light as a central theme. . . . As a guide along the path of light Mr. Sobel is excellent."--James Cornell, "New York Times Book Review