Lost On Venus

When Carson Napier, Californian, pierced the mist-laden cloud blanket that shrouded the mysterious planet Venus, he embarked on an unparalleled adventure. For this planet was peopled by several antagonistic civilizations—none of whom believed his fantastic tale of the far-distant Earth he had come from. To them he was just a spy from another Venusan city—deserving only death. - Summary by Edgar Rice Burroughs