The movement here from small tests to bigger ones masterfully escalates the suspense. The juxtaposed points of view, with reactions of each protagonist to the other, keep the reader guessing until the end. A great follow-up to The Wife between Us.
Almost nothing about this story or its characters is believable or makes much sense, from Jessica's naiveté to Lydia's sociopathic tendencies to the awful and life-changing bit of personal history they share. Leave that aside, though, and you can still have a bit of fun watching their game of cat and mouse play out ... A harmless page-turner.