Pocket Timescape, New York, 1983, 1^st pr thus.  ISBN 0-671-83579-3.  MMPB, 188 pages.  Good reading copy; wraps have edge and cover wear, creases and reading creases; prior owners embossed stamp on front wrap; tight binding.  Interior clean and unmarked with tanned pages.  ‘William Blackhorse Singer, the last Navajo tracker on a future earth, has stocked the Interstellar Life Institute with its most exotic creatures.  But one of Singer’s prizes preys upon his mind:  a metamorph, the one-eyed shapeshifter Cat, whose home planet has been destroyed.  Billy offers Cat freedom to help him stop an alien assassin, and Cat accepts.  The price:  permission to hunt Billy.  And the deadly game begins.  In a fierce, global hunt, Billy flees his extra-sentient killer.  And suddenly, he is pursuing not life, but the mysteries of his people, and the blinding vision of his own primeval spirit.’ (from rear wrap)