It's 2039 and the solution to prison overcrowding has been discovered.
Operation Timekeeper, deep in the old nuclear complex at Oak Ridge, Tennessee, has finally found the secret to time travel. The idea is to offer "alternate incarceration" -- a practical application to the problem while simultaneously conducting scientific studies. The decision leads to unforeseen consequences when a certain Hungarian billionaire and his son determine to steal the technology with the help of a traitor in OT's ranks.
Webb presents another tale of post-Catastrophe Earth along the timeline of his Last Brigade books but dealing with the interim timeline. Bouncing between modern and prehistoric time, he gives us a story of invention, betrayal, courage, and greed. Science fiction at its best.