The Bone Labyrinth

a Sigma Force Novel
Title rated 3.95 out of 5 stars, based on 171 ratings
"Sigma Force Commander Gray Pierce makes paradigm-shifting discoveries about human evolution while investigating shadowy figures depicted in Neanderthal cave paintings."--
A war is coming, a battle that will stretch from the prehistoric forests of the ancient past to the cutting-edge research labs of today, all to reveal a…

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