Summary:

This book interweaves an American love story with the development and repercussions of x-ray technology and atomic energy. It is an intriguing and beautifully written story. The setting is the southeastern United States, where the male protagonist, Fos, meets and marries Opal. Fos is a returning World War I veteran when the story begins; the story ends some years after the atomic bomb is dropped in World War II.

Fos is stationed in France during World War I. His assignment is to produce chemical flares. He shares a trench bunker with "Flash," the regiment photographer. After the war is over, Fos and Flash open up a photography shop in Flash's hometown of Knoxville, Tennessee. Fos is fascinated by natural phenomena such as phosphorescence, radiation, and the application of scientific discoveries for practical use. Flash is a good businessman and has a way with the ladies.

After Fos marries Opal, the three are in business together--Opal has accounting experience and handles the shop's "books." On the side, Fos and Opal have a traveling show that features an "x-ray box" where people can view the skeleton of their own feet. Opal is part of the show, on exhibit to demonstrate how this works as Fos x-rays her feet. A baby comes into their lives--they name him Lightfoot. The novel takes these characters and a few other connected figures through the 1920s into the Depression of the 1930s and formation of the Tennessee Valley Authority, to the work on the atomic bomb at Oak Ridge National Laboratory. Fos is recruited by the government to work at Oak Ridge--to take photographs. To say any more about the plot would spoil the pleasure of reading this absorbing book.

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