A young European boy living in San Francisco is reluctant to marry his long-term girlfriend because he wants to travel around the world first. His wealthy uncle agrees to send…

Kronos, hero of a distant galaxy, tangles with mad scientist Gulik over the fate of mankind.

A 19th-century expedition to the Earth’s core reveals primordial wonders, prehistoric monsters and a subterranean civilization that may convey the greatest discovery of all.