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THEY SENT ONE MAN TO BLOCK AN INTERPLANETARY WAR! "We have been at war for eighteen months and have only just discovered the fact! Venus and Mars are attacking us - -and we can't do a thing about it!" That's what the World Council told David Raven when they gave that space pilot the most dangerous mission of his career. Earth's rebellious colonies on Mars and Venus were out to win their independence by fair means or foul. Being still technically citizens of Earth, they could send their sabotage squads down without legal interference to spread havoc and wage secret warfare. And those traitorous colonists were talented beyond all normal abilities. Some were super-hypnotists, some could read thoughts, some could start fires by merely pointing a finger, and some could change their features to match anyone's. Single-handed, David Raven was supposed to outwit them all and restore peace!