- AudiolibroGustav Gloom and the People TakerAdam-Troy Castro
- AudiolibroGustav Gloom and the Nightmare VaultAdam-Troy Castro
- AudiolibroGustav Gloom and the Four TerrorsAdam-Troy Castro
- AudiolibroGustav Gloom and the Inn of ShadowsAdam-Troy Castro
- AudiolibroGustav Gloom and the Cryptic CarouselAdam-Troy Castro
- AudiolibroGustav Gloom and the Castle of FearAdam-Troy Castro
- AudiolibroSeries: Gustav GloomAdam-Troy Castro