The Oath: The Druid Chronicles, Book One

When the last of members of a secretive Druid cult are forced to abandon their hidden sanctuary, they send the youngest of their remaining priests in search of Annwr, their chief priestess’s sister, who was abducted by a Saxon war band fifteen years ago. With only a rudimentary grasp of English and the ambiguous guidance of an oracle’s prophecy, Caelym manages to find Annwr living in a hut on the grounds of a Christian convent.

Annwr has spent her years of captivity caring for the timid Ale...