Book 1

Gustav Gloom and the People Taker #1

by Adam-Troy Castro, Kristen Margiotta
Nov 8, 2012
English
Kindle (250 pages)

Book 2

Gustav Gloom and the Nightmare Vault

by Adam-Troy Castro, Kristen Margiotta
Apr 18, 2013
English
Hardcover (248 pages)

Gustav Gloom and the Nightmare Vault #2

by Adam-Troy Castro, Kristen Margiotta
May 15, 2014
English
Paperback (248 pages)

Book 3

Gustav Gloom and the Four Terrors

by Adam-Troy Castro, Kristen Margiotta
Aug 15, 2013
English
Hardcover (241 pages)

Book 4

Aug 14, 2014
English
Kindle (250 pages)

Book 5

Aug 11, 2015
English
Kindle (240 pages)

Book 6

Gustav Gloom and the Castle of Fear

by Adam-Troy Castro, Kristen Margiotta
Aug 16, 2016
English
Hardcover (272 pages)