The Devil & The Excise-Man (Forgotten Gods Book 1)

February 1746. The daione sìdhe have the run of what was once Great Britain as Scotland and England struggle to hammer out a treaty. On one side of the disputed border, the Jacobite rebels in Scotland have secured their nation's freedom, but are now faced with the task of learning to live alongside the supernatural beings which now roam the cities and countryside, even as the strange behavior of the faerie folk erodes the crucial good will of the French and Spanish ambassadors.
In London, the English elite are fleeing to colonies overseas, leaving behind an increasingly desperate and loyal few to fight for survival against an enemy which seems to defy the very laws of nature. Maxwell Thorley, already worked to exhaustion at his job in England’s Treasury and Excise, has begun to encounter strange beings that only he can see. When a mysterious Scottish doctor tells him that his visions are the product of magic, not madness, he is tempted into using his newfound abilities to help his country, even at the cost of his fortune, his family, and his soul.
As the stability of both governments becomes increasingly tenuous, a cadre of men in Westminster plot to destroy the nascent peace talks, a move that could solidify their hold on power-- or plunge the entire island into anarchy. But now that both sides have called on supernatural forces that they do not understand-- and perhaps cannot control-- it may already be too late.