James Fenimore Cooper 
The Spy : A Tale of the Neutral Ground 
A Tale of the Neutral Ground

This historical adventure with a hint of romance takes place during the American Revolution, when a man, only known as Mr. Harper, requests shelter at The Locusts during a storm. When another unknown stranger appears in want of shelter, Mr. Harper, and the Locust family, become quite suspicious. As the battle between the Patriots and the British is fought in their midst, an internal struggle occurs in the house of one family.