**MAJOR SPOILERS — stop here if you still want to read it yourself.**

Assuming you mean Ottilie Marsh’s 2023 thriller about art thief Linn: **Richard, the seemingly helpful hotel owner, is the serial killer.** The murder and the evidence pointing toward Linn are part of a setup—he has engineered the situation to draw her in and frame her for the theft and killing. The real danger isn’t one of the obvious suspects; it’s the person everyone trusts.