Brigid Kemmerer is an American author of young-adult fantasy and romance novels, best known for her series Cursebreakers and Defy the Night. She is a New York Times bestselling author known for her dark and alluring YA novels like A Curse So Dark and Lonely, Defy the Night, and Letters to the Lost.

Brigid lives in the Baltimore area with her family and is a full-time writer. When she is not writing or being a mom, she can usually be found with her hands wrapped around a barbell.