The bridge is out. The phones are down. And the most famous mystery writer in the world just disappeared out of a locked room two days before Christmas. Meet Maggie Chase and Ethan Wyatt: She’s the new Queen of the Cozy Mystery. He’s Mr. Big-time Thriller Guy. She hates his guts. He thinks her name is Marcie (no matter how many times she’s told him otherwise.) But when they both accept a cryptic invitation to attend a Christmas house party at the English estate of a reclusive fan, neither is expecting their host to be the most powerful author in the world: Eleanor Ashley, the Duchess of Death herself. That night, the weather turns, and the next morning Eleanor is gone. She vanished from a locked room, and Maggie has to wonder: Is Eleanor in danger? Or is it all some kind of test? Is Ethan the competition? Or is he the only person in that snowbound mansion she can trust?