• Gustav Gloom Series
    Gustav Gloom and the People Taker (#1)
    Adam-Troy Castro
  • Gustav Gloom Series
    Gustav Gloom and the Nightmare Vault (#2)
    Adam-Troy Castro
  • Gustav Gloom Series
    Gustav Gloom and the Four Terrors (#3)
    Adam-Troy Castro
  • Gustav Gloom Series
    Gustav Gloom and the Cryptic Carousel (#4)
    Adam-Troy Castro
  • Gustav Gloom Series
    Gustav Gloom and the Inn of Shadows (#5)
    Adam-Troy Castro
  • Gustav Gloom Series
    Gustav Gloom and the Castle of Fear (#6)
    Adam-Troy Castro