"High-stakes, harrowing, and chilling as midnight ocean spray. [A] genuinely ghoulish treat." —The New York Times
"Ghostbusters meets Stranger Things in Oppel’s perceptive supernatural thriller." —Publishers Weekly
★ "Oppel’s latest begs to be made into a movie: visually cinematic with witty humor, nonstop action, a dash of romance, and plenty of heart. A thrill ride packed with harrowing escapes, puzzling mysteries, and memorable characters." —School Library Journal, starred review
"Friendship with ghosts can be chilling. A spooktacular story that’s surprisingly insightful." —Kirkus Reviews
"Action and horror elements propel the fast-paced narrative." —Booklist
"Viker is a monstrously novel villain." —The Bulletin
"A complete winner." —Locus