by Del Lester Rey (Author)

Daniel Feldman had once been a doctor. He made the mistake of saving a friend's life in violation of the Medical Lobby rules. Now, he's a pariah, shunned by all, forbidden to touch another patient. But things are more loose on Mars. There Doc Feldman is welcomed by the colonists, even as he's hunted by the authorities. But, when he discovers a Martian plague may soon wipe out humanity on two planets, Feldman finds himself a pivotal figure. War erupts. Earth is poised to wipe out the Mars colony .

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