Getting Happy with Parker Pyne: Have You Got Everything You Want? by Agatha Christie

All aboard the... Orient Express?! That's right: heart specialist Parker Pyne is going abroad, and while we've already covered one of his travels in Christie's *other* Death on the Nile, here he untangles a jewel heist (or is it?) aboard that infamous train right around the same time Monsieur Poirot was taking it in the opposite direction. (Maybe one day someone will find an alternate And Then There Were None in the basement at Greenway, in which Pyne finds himself on an island being hunted down by a murderer, only to solve the murderer's problems by means of an elaborate theatrical ruse....)