Cluster (Cluster series, Bk. 1)

From the back cover: From the regions of Outworld to the land of the Canopians and beyond -- through the distant reaches of time and space and the vast spectrum of Kirlian apparitions -- Flint the Caveman is master and slave, conqueror and hero, slayer primeval and seducer triumphant... FLINT OF OUTWORLD HAS COME!