From the Publisher:
The Psychologists would call it folie a deux.... 'Bruno slammed his palms together. 'Hey! Cheeses, what an idea! I kil lyour wife and you kill my father! We meet on a train, see, and nobody knows we know each other! Perfect alibis! Catch?'' From this moment, almost against his conscious will, Guy Haines is trapped in a nightmare of shared guilt and an insidious merging of personalities.
Patricia Highsmith: Strangers on a Train. Vintage, ISBN: 0099283077 (August, 1999), 255 p., £6.99.