Voorloper: An Illustrated SF Adventure Hardcover – January 1, 1980 by Andre Norton  (Author), Alicia Austin (Illustrator)
 
No one knew of Voor's menace until fifty years after the first ship landed. Even then, it was only a handful of outpost villages that were hit-twenty or so deaths in each case. And there were plenty of logical reasons, if one chose to believe them: bad water...contaminated food... attacks by previously unknown native predators. Yet none of those explanations held up after the Shadow Death struck Mungo's town. Logic could not explain away two hundred and twenty awful deaths. My mother died at Mungo, and my father and I took up the only life a wise man followed on Voor. We became lopers-wandering, learning, seeking out the places wherever the Shadow Death had left its mark...determined to stop the horror or be taken by it! With fifty original illustrations by Alicia Austin
 
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