The lower forests crawl with danger, yet the cold and unforgiving mountains provide little to sustain a family. In the age of stone and fire, the world is filled with unknown threats to the survival of Karg's family. When he finally discovers safety in a hidden valley, an explosion shakes the mountain, awakening yet another terrifying danger: the Kthpok. Extraterrestrial invaders have harnessed nuclear technology and seek to dominate the earth and enslave their human rivals. The Kthpok have discovered Karg's family. And now they are hunted. If his family can't evolve to face the enemy, the freedom and future of humankind will be lost. Lovers of , , and alternate history will devour this epic beginning to the Rise of Man trilogy. is a new take on sci-fi favorites.