The English Spy — Donald Smith

This tale of intrigue and betrayal goes to the heart of events surrounding the Treaty of Union in 1707. Daniel Foe (better known as Defoe), sent to Scotland to sway opinion towards Union, reports to his English spymaster. But Edinburgh is already a hotbed of counter-plots and nascent rebellion. Foe's encounters with a landlady who is not what she seems, and with a beautiful Jacobite agent, lead him to become a novelist, against his better instincts.