19717X1 Eleventh Printing, 1980. Ballantine Books, New York: 1980. 276 pages. Softcover. reading copy with some discoloration. In the year 2130, a strange object is discovered, hurtling through space on what could be a collision course with Earth, where scientists have to answer--and fast--if Mankind is going to be ready for its first encounter with an alien intelligence. ISBN: 0345291972 $7.50USD
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