Author: SILVERBERG ROBERT
Title: THE SILENT INVADERS
Description: Ace, 1973. 2nd printing. Abner Harris was sent to Earth on a mission of extreme urgency:the universe was in danger of enslavement by the pebble-skinned Medlins, and the fight against them called for Harris to assume the disguise of a flesh-and-blood Earthman. "Paperback. fine paperback.

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