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- ISBN: 9780441008926 | 0441008925
- Cover: Paperback
- Copyright: 12/31/2001
In the early 22nd century, humans' electronic reproductions, known as engrams, have been sent on fact-finding missions throughout the known universe-searching for signs of alien life. But what they find exceeds their wildest dreams-in nightmarish proportions. "Includes one of the most heart-stopping moments I've encountered in a novel in years." (Jack McDevitt)