Thousands of women eventually worked at the facility now known as Oak Ridge in Tennessee, many like the recent high school and college graduates Kiernan profiles. What they knew was they were helping to shorten the war, what they didn't know was they were enriching uranium to build the atomic bomb. Kiernan deftly weaves the story of these young women with the larger story of the talent, intrigue and politics that ushered in the atomic age. Pretty fascinating. For another book I loved that's set in this place and time read Marianne Wiggins 'Evidence of Things Unseen.'