Two To Conquer is a science fantasy novel by American writer Marion Zimmer Bradley; it is part of the Darkover series, set at the end of Ages of Chaos, in the period of Darkover's history known as the Hundred Kingdoms. The book's introduction places it two hundred years after the events in the book entitled Stormqueen!. at the end of the Ages of Chaos, and the start of the Hundred Kingdoms.