Gravity Hardcover – September 1, 1999 by Tess Gerritsen
 
Chosen to conduct a three-month series of NASA experiments with single-cell organisms called Archaeons, Dr. Emma McCallan soon discovers the terrifying nature of these organisms and must race against time to stop a deadly disease that could threaten the entire world 125,000 first printing. Mystery Guild Main. Doubleday Super Release.
 
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