NEW YORK TIMES BESTSELLER • In this “infectious medical thriller” (Kirkus Reviews) from the renowned author of Coma, two young women, curious about their donated eggs, uncover a plot more sinister than either of them could have imagined. . . . “Leave it to doctor-turned-novelist Robin Cook to scare us all to death.”—Los Angeles Times   Graduate students Deborah Cochrane and Joanna Meissner respond to a campus newspaper ad that promises to solve their financial problems: An exclusive, highly profitable fertility clinic northwest of Boston is willing to pay top dollar to a few attractive, slim, athletic Ivy League egg donors.   But second thoughts and curiosity prompt the two women to find out more about their donated eggs. Obtaining employment at the clinic under aliases, they soon discover the horrifying aims of its research, immediately putting their lives—and their sanity—irrevocably at risk. . . .