Holly currently lives in New England with her husband and son in a Tudor cottage with a secret door. There, she enjoys caffeine, reading, and revelry.
Holly is the author of bestselling contemporary fantasy books for kids and teens. Some of her titles include The Spiderwick Chronicles (with Tony DiTerlizzi), The Modern Faerie Tale series, the Curse Workers series, Doll Bones, The Coldest Girl in Coldtown, the Magisterium series (with Cassandra Clare) and The Darkest Part of the Forest. She has been a finalist for an Eisner Award, and the recipient of the Andre Norton Award, the Mythopoeic Award and a Newbery Honor.