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Cover art:
Blurb: “A YOUNG MAN IN DEADLY PERIL
CHALLENGES THE POWER OF THE STARS!
The secret of faster-than-light space travel is jealously guarded by the Lhari, reptilian aliens who kill all invaders.
Only one man can unravel this mystery, with a new discovery_a color invisible to human eyes. But the hunter becomes the hunted, as the Lhari pursue him into a web of deadly interstellar intrigue!
From the author of the famous Darkover Series”