Rosemary Edghill is a prolific writer in several genres, under her own name and various pseudonyms. Her Bast books, witty mysteries featuring a Wiccan amateur detective, were collected in Bell, Book, and Murder. She has also written Regency Romances and fantasy novels, including several collaborations with Mercedes Lackey (Spirits White as Lightning and Mad Maudlin) and Andre Norton (Shadow of Albion and Leopard in Exile).

Edghill lives in upstate New York with several cats and several Cavalier King Charles Spaniels, which she shows in obedience competitions.