Dan Carter, head of the London division of Private, the world's most exclusive detective agency, must join forces with his ex-wife if he is going to save American student Hannah Shapiro from a threat that has stalked her for eight years.

"Anne Perry, that incomparable novelist of life in Victorian England, has once again surpassed herself, with this twenty-first installment of her New York Times best selling William Monk series. In Corridors of the Night, nurse Hester Monk and her husband, William, commander of the Thames River Police, do desperate battle with two obsessed scientists who in the name of healing have turned to homicide. The monomaniacal Rand brothers--Magnus, a cunning...