“Reinvents the medical thriller.”— Library Journal Dr. Sarah Baldwin races to a Boston hospital with a young woman whose normal labor has suddenly become a matter of life and death. As she struggles to save both mother and baby, she doesn't know that two other women have already died under horrifying identical circumstances. And so begins Sarah's own nightmare, as she learns that the prenatal herbal vitamins she prescribed are the only thing these women have in common. Soon Sarah is fighting to save her career, her reputation—her life. For she's certain there must be some unknown factor linking these women, and as she gets closer to the truth, it becomes clear that someone will do anything—even murder—to keep a devastating secret. “Reinvents the medical thriller.” — Library Journal "Dr. Sarah Baldwin races to a Boston hospital with a young woman whose normal labor has suddenly become a matter of life and death. As she struggles to save both mother and baby, she doesn't know that two other women have already died under horrifying identical circumstances. And so begins Sarah's own nightmare, as she learns that the prenatal herbal vitamins she prescribed are the only thing these women have in common. Soon Sarah is fighting to save her career, her reputation--her life. For she's certain there must be some unknown factor linking these women, and as she gets closer to the truth, it becomes clear that someone will do anything--even murder--to keep a devastating secret. "Reinvents the medical thriller."- Library Journal ldwin races to a Boston hospital with a young woman whose normal labor has suddenly become a matter of life and death. As she struggles to save both mother and baby, she doesn't know that two other women have already died under horrifying identical circumstances. And so begins Sarah's own nightmare, as she learns that the prenatal herbal vitamins she prescribed are the only thing these women have in common. Soon Sarah is fighting to save her career, her reputation--her life. For she's certain there must be some unknown factor linking these women, and as she gets closer to the truth, it becomes clear that someone will do anything--even murder--to keep a devastating secret. Dr. Sarah Baldwin races to a Boston hospital with a young woman whose normal labor has suddenly become a matter of life and death. As she struggles to save both mother and baby, she doesn't know that two other women have already died under horrifying identical circumstances. And so begins Sarah's own nightmare, as she learns that the prenatal herbal vitamins she prescribed are the only thing these women have in common. Soon Sarah is fighting to save her career, her reputation--her life. For she's certain there must be some unknown factor linking these women, and as she gets closer to the truth, it becomes clear that someone will do anything--even murder--to keep a devastating secret. Michael Palmer, MD,  (1942–2013) was the author of  Miracle Cure ,  Critical Judgment ,  Silent Treatment ,  Natural Causes ,  Extreme Measures ,  Flashback ,  Side Effects , and  The Sisterhood. His books have been translated into thirty-five languages. He trained in internal medicine at Boston City and Massachusetts General hospitals, spent twenty years as a full-time practitioner of internal and emergency medicine, and served as an associate director of the Massachusetts Medical Society’s physician health program. IT WAS EXACTLY SEVEN POINT TWO MILES FROM SARAH Baldwin’s North End apartment to the Medical Center of Boston. Today—a Monday—the roads were dry, the humidity low, and at six A.M., the traffic virtually nonexistent.   Sarah squinted up at the early-morning glare, getting a sense of the day. “Nineteen minutes forty-five seconds,” she predicted.   She straddled her Fuji twelve-speedy, adjusted her safety helmet, and set her stopwatch to zero. Just fifteen seconds either way had become the allowable margin in the contest. More often than not, she won. Over the two years she had been commuting by bike to MCB, she had honed her accuracy by factoring into her average time as many arcane variables as she could remember on any given day. Tuesday or Thursday? … Add thirty seconds. Regular coffee at breakfast instead of decaf?… Deduct forty-five. Two nights in a row off call? … A full minute or more to the good. Today she also factored in the need to pedal hard enough to feel she had exercised, but not so hard as to break much of a sweat.   She glanced along the quaint row houses lining her narrow street, keyed her stopwatch, and shoved off. Once a near fanatic about fitness, she had now all but given up on formal workouts. Instead, she would push herself to the limit on the ride to work, shower at the hospital, and then change into her scrubs for rounds. But today nothing would be usual. At the Medical Center of Boston, as at most of the teaching hospitals around the country, this was July 1—Changeover Day.   For every physician in tra