Who was the mysterious stranger who helped injured Londoners during the Blitz—and then vanished? Who was the beautiful blonde girl who blazed like a supernova on the 1970s psychedelic rock scene for a few weeks—and then vanished? How could an astronaut have reached Mars decades before the first manned expedition to the planet finds her body there? Have all humanity's dreams of a majestic ancient Martian civilization been more than just dreams? Is the future of the human race at stake? In the grand tradition of Arthur C. Clarke, a stunning hard sf novel—the first from internationally known astronomical artist David A. Hardy—that will stretch your imagination in ways you've never experienced before. A science-fictional tour de force, now revised and expanded in a stunning Second Edition!