Traitor in Williamsburg: A Felicity Mystery (American Girl Mysteries)

Felicity Merriman is alarmed when mysterious notices appear in Williamsburg, falsely accusing her friend Fiona's father of helping th British. With the Revolution heating up, Felicity knows the accusations will bring danger to Fiona's family. Then Felicity's own father is accused of being a traitor, too, and she decides she has to find out who's making the terrible accusations!

Set in 1776.