Gustav Gloom and the Nightmare VaulteBook - 2013
As Fernie and Gustav battle the Shadow Eater, who seeks The Nightmare Vault for his master, the evil Lord Obsidian, Fernie learns about Gustav's mysterious past and just what happened to his missing parents.
Publisher: New York : Penguin Group US, 2013
Characteristics: 1 online resource
Alternative Title: Gustav Gloom & the nightmare vault