MixedThe New York Times Book ReviewThe turn, when it comes, is both satisfying and somehow disappointing. Until now, the high-wire act Lehane has managed — to craft a character thriller, a psychological nail-biter based on real emotion and relatable anxiety — has been the rarest kind of page-turner, one in which character, not plot, drives the book’s addictiveness. The thriller that emerges in the last 100-plus pages is more than satisfying on its own merits. Lehane takes all of Rachel’s weaknesses, the tools she has used to overcome her deep psychological flaws, and turns them into strengths in navigating a world gone mad ... But at the same time, there is something reductive about the last third of the book. A story that flirted with the unsolvable mysteries of a human being called Rachel becomes a simple tale of what happens next.