Book 1 in a new series from the creator of the best-selling Freehold Universe series. A military unit is thrust back into Paleolithic times with only its guns and portable hardware.
- ISBN10 1476781729
- ISBN13 9781476781723
- Publish Date 11 July 2016 (first published 25 May 2015)
- Publish Status Active
- Out of Print 11 March 2021
- Publish Country US
- Imprint Baen Books
- Format Paperback
- Pages 960
- Language English