- Series: The Lost Level Series Record # 49079
- Sub-series of: The Labyrinth Universe
- The Lost Level
- 0.5 Hole in the World (2019) by Brian Keene
- 1 The Lost Level (2014) by Brian Keene
- 2 Return to the Lost Level (2018) by Brian Keene
- The Lost Level (excerpt) (2015) [SF] by Brian Keene
- Excerpt: Return to the Lost Level (2018) [SF] by Brian Keene
- Hole in the World (excerpt) (2019) [SF] by Brian Keene