&quot;A PAGE-TURNER . . . THOROUGHLY FRIGHTENING.&quot;<br>--Newsweek<br><br>&quot;ENORMOUSLY ENTERTAINING.&quot;<br>--The New York Times Book Review<br><br>&quot;THIS BOOK SCARED THE LIVING DAYLIGHTS OUT OF ME. . . . Manages to grab you with the authenticity of its scientific detective work and haunt you with its sheer plausibility.&quot;<br>--Entertainment Weekly<br><br>Five days ago, a homeless man on a subway platform died in agony as startled commuters looked on. Yesterday, a teenager started having violent, uncontrollable spasms in art class. Within minutes, she too was dead.<br><br>Dr. Alice Austen is a medical pathologist at the Centers for Disease Control in Atlanta. What she knows is that the two deaths are connected. What she fears is that they are only the beginning. . . .