The Civilian Conservation Corps was one of the most popular programs of President Franklin D. Roosevelt's New Deal. Over the nine years of the program, from 1933 to 1942, over two and one-half million unemployed young men found work on conservation projects across Depression-stricken America. "Roosevelt's Tree Army," as the CCC men were sometimes called, planted billions of trees, fought forest fires, did historic preservation work, and constructed recreational facilities in state and national parks. At Work in Penn's Woods offers a rich and compelling portrait of Pennsylvania's...