Title: The Mystery of the Blue Train
Author: Agatha Christie
Publication: Dodd, Mead & Co., hardcover, originally published in 1928
Genre: Mystery
Setting: France and England
Description: An American millionaire, Rufus Van Aldin, has purchased priceless rubies for his only child, Ruthie, which distracts her temporarily from annoyance with her philandering husband. She is heading to France to rendezvous with her first love (dismissed as a fortune hunter by her father years earlier) and takes the famous Blue Train, which brings affluent travelers to the Riviera.