After the strange mediocrity of The Big Four, I was glad to see Agatha Christie and Hercule Poirot back in form with The Mystery of the Blue Train (1928). This one's a good read filled with luxury train travel, mysterious rubies, heiresses, millionaires, and a long interlude in the French Riviera.
Poirot himself doesn't arrive until page 62, by which time Christie has set the scene with her usual expert touch. The mystery itself is clever, the red herrings fly fast and furious, and the plot kept me guessing along all the way to the end.
It's a good one.
Summary: Take a ride on "The Millionaire's Train." You'll have a good time.
Amazon: The Mystery of the Blue Train.
Wikipedia: The Mystery of the Blue Train.
Where and How Acquired: Used, from John K. King Books.