The setting of the book is primarily in:
* 1942, in the midst of World War II. The story is set in a small town in New York State, called Eastham, which is close to a military camp and faces the impact of war.
* 1876, in the Victorian era. The story also takes place in London, England, specifically in the Victorian era where a young girl named Anna is trapped in time.
The story intertwines these two time periods, moving back and forth between the two settings and showing how the events in both eras are connected.
Let me know if you'd like more details about the specific locations within these settings.