A new Alex Benedict novel from "a master of describing otherworldly grandeur" (Denver Post). Forty-one years ago, the renowned physicist Chris Robin vanished. Before his disappearance, his fringe-science theories about the existence of endless alternate universes had earned him both admirers and enemies. Alex Benedict and Chase Kolpath discover that Robin had several interstellar yachts flown far outside the planetary system, where they too vanished. And following Robin's trail into the unknown puts Benedict and Kolpath in danger.