Holly Black is the author of bestselling contemporary fantasy books for kids and teens. Her titles include the Spiderwick Chronicles (with Tony DiTerlizzi), The Coldest Girl in Coldtown, the Magisterium series (with Cassandra Clare) and the Folk of the Air series, which begins with The Cruel Prince in 2018, nominated for the CILIP CARNEGIE MEDAL 2019, and winner of the Silver Inky for best International YA book. She has been a a finalist for an Eisner Award, and the recipient of the Andre Norton Award, the Mythopoeic Award and a Newbery Honor. She lives in New England with her husband and son in a house with a secret door. Follow Holly at blackholly.com or @HollyBlack Rovina Cai is a freelance illustrator who works across a variety of genres. Her poetic imagery has served as book covers, posters and interior art for novels and picture books. She recently won the World Fantasy Award for best artist. Her work has also been recognised by organisations like the Society of Illustrators, and the Children's Book Council of Australia. Rovina works out of a cosy studio in Melbourne, Australia, in an old building that was once a convent and is possibly haunted.