| | Introduction | p. ix |
| | Principal Cast of Characters | p. xiii |
| | Map-Clinton Engineer Works, Tennessee, 1943-1945 | p. xviii |
| | Revelation, August 1945 | p. 1 |
| | Everything Will be Taken Care of: Train to Nowhere, August 1943 | p. 3 |
| | Tubealloy: The Bohemian Grove to the Appalachian Hills, September 1942 | p. 15 |
| | Peaches and Pearls: The Taking of Site X, Fall 1942 | p. 20 |
| | Tubealloy: Ida and the Atom, 1934 | p. 32 |
| | Through the Gates: Clinton Engineer Works, Fall 1943 | p. 35 |
| | Tubealloy: Lise and Fission, 1938 | p. 57 |
| | Bull Pens and Creeps: The Project's Welcome for New Employees | p. 63 |
| | Tubealloy: Leona and Success in Chicago, December 1942 | p. 75 |
| | Only Temporary: Spring into Summer, 1944 | p. 81 |
| | Tubealloy: The Quest for Product | p. 99 |
| | To Work | p. 109 |
| | Tubealloy: The Couriers | p. 131 |
| | Rhythms of Life | p. 133 |
| | Tubealloy: Security, Censorship, and the Press | p. 151 |
| | The One About the Fireflies … | p. 156 |
| | Tubealloy: Pumpkins, Spies, and Chicken Soup, Fall 1944 | p. 172 |
| | The Unspoken: Sweethearts and Secrets | p. 176 |
| | Tubealloy: Combining Efforts in the New Year | p. 191 |
| | Curiosity and Silence | p. 193 |
| | Tubealloy: The Project's Crucial Spring | p. 205 |
| | Innocence Lost | p. 209 |
| | Tubealloy: Hope and the Haberdasher, April-May 1945 | p. 223 |
| | Sand Jumps in the Desert, July 1945 | p. 232 |
| | The Gadget Revealed | p. 249 |
| | Dawn of a Thousand Suns | p. 269 |
| | Life in the New Age | p. 286 |
| | Epilogue | p. 311 |
| | Notes | p. 317 |
| | Acknowledgments | p. 349 |
| | Index | p. 353 |
| | About the Author | p. 373 |