Premise: The Spies of Warsaw is a 2008 spy novel by Alan Furst about espionage involving the major nations shortly before World War II competing for influence and control over the future of Poland. The story starts in October 1937 and ends in May 1938, with a one paragraph description outlining the future of the two lead characters.
Hypothesis: Furst included a description about occurrences after May 1938 in The Spies of Warsaw.