Armon Collins is abducted by a strange force but soon he becomes a Big Foot or yeti, and later he calls himself a Bi-Man or protector and guardian of man.
In this fourth and final installment the intrepid crew is taken to the limits of their endurance as they brave a subterranean world filled with dangers and bizarre wonders. When Thurid’s warriors are defeated the crew frees the Grettig family from ca
