Redoubt of Ghosts by J. E. Bruce
Approx. 89,800 words.
Published on October 24, 2012 by
Humanity's survival hangs by a thread. Only if a small crew of time-traveling scientists can collect clean genetic material and viruses capable of delivering that material to living humans can our extinction be prevented.Time travel brings its own problems, including the potential shift in the timeline rendering the scientists unborn. But can stand by and do nothing during the siege of Carthage?