Stamboul Train

One of Greene's early novels.
It was an interesting premise - a number of unconnected characters on the Orient Express from Ostend to Constantinople, whose story becomes connected - and the characters are interesting and built well.
It seems like an opportunity was missed however when events took place off the train, which seemed to distract from, or weaken the story a little for me.
I was also a bit confused about the route of the train, as according to Wikipedia, the train never followed the route of the book: Ostend - Cologne - Vienna - Budapest - Belgrade - Constantinople. Wikipedia Orient Express

Anyways, no spoilers, as the characters do a good job of providing information as the book progresses, so I wouldn't want to ruin it...
A comfortable three stars for me.