Everkin Kindred series, book 0

Summary: To live in the light, they hunt in the dark. When natural-born witch Edra is approached by others who share her gifts, she jumps at the chance to join a Coven. Until she discovers that they're not what they seem. They're hell-bent on destruction, and in order to save herself and those she loves, Edra must leave her home, and the only man she's ever loved. Squire-turned-knight Radnar has never been the same since the love of his life disappeared in the middle of the night seven years ago. Despite his broken heart, he doesn't give up hope of finding her again. Only when he does, he gets more than he bargained for, and his world is turned upside down. Being brought back together in the midst of magic and danger, Radnar and Edra rekindle their once in a lifetime love and set about making the world a safer place. But can they do it alone, or will it require a much grander plan?