A painter shoots her husband and never speaks again; a psychotherapist becomes obsessed with getting her to talk. The hook does the heavy lifting for the first half, and the twist reframes everything you thought you knew. It is engineered to be finished in a weekend, and it mostly earns that — though readers who want deep character work may find the machinery showing.
Verdict: Read it for a fast, twisty weekend. Don't expect a literary novel; expect a very good puzzle.