This book is part of a book series called Cerulean Series .

This book has been graded for interest at 14-17 years.

This book was published 2019 by HarperCollins .

Amy Ewing is a graduate of the New School's MFA program in Writing for Children, and has a BA from New York University. The daughter and granddaughter of librarians, she is a self-confessed high-fantasy nerd who meant to be an actor, but found herself a writer. She lives in New York.