Put a crime story on a boat and the genre does half the work for you. Nowhere to run, a small cast who cannot avoid one another, and water in every direction: Kayte Nunn’s The Yacht takes the locked-room principle out to sea, where it has always worked rather well.
Eight and a half hours is the classic length for suspense of this kind, tight enough to sustain pressure and generous enough for the secrets to surface in the right order. The thriller shelf is where the catalogue places it, and the title promises that particular flavour of menace which comes with money, leisure, and people behaving badly a long way from shore.
Our entry rests on the writing itself, which for a book designed to be consumed quickly and argued about afterwards is entirely fitting.