Aurora: A Child of Two Worlds, by David A. Hardy (TPB)

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.