"That rarest of beasts: the perfect thriller. This extraordinary novel set my blood fizzing—I quite literally couldn’t put it down. I told myself I'd just dip in; eleven hours later—it's now 5:47 a.m.—I've finished it, absolutely dazzled." **—A. J. Finn, #1 *New York Times* bestselling author of *The Woman in the Window*** **Promising to be *the* debut novel of the season *The Silent Patient...