The Shepherd King is a fantasy duology written by Rachel Gillig. The series includes the novels One Dark Window (2022) and Two Twisted Crowns (2023).

The story takes place in a kingdom where magic is bound to the mystical Providence Cards — enchanted cards, each with its own unique power and a price the bearer must pay. The main protagonist, Elspeth, is trying to survive while hiding a dangerous curse. She becomes entangled in a perilous plot to overthrow a tyrannical king and to eradicate an ancient blight that plagues the land.