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Quick Facts
| Author | Joshua T. Calvert |
| Narrator | Gary Tiedemann |
| Runtime | 11h22m |
| Published | June 17, 2025 |
| Rating | 3.9 / 5 (2 ratings) |
| Categories | Science Fiction & Fantasy, Science Fiction, First Contact, Hard Science Fiction, Space Exploration |
| Format | Audiobook (Digital) |
| Platform | Audible |
About This Audiobook
When NASA's Sentinel I satellite detects an impossible reflection and a mysterious signal from Shackleton Crater, the world is thrown into chaos. The discovery points to one chilling truth: an alien artifact lies hidden beneath the lunar surface—and it wants to be found.
Why Listen to The Shackleton Signal?
- Expert narration by Gary Tiedemann brings every character and scene to life across 11h22m of immersive audio.
- Bestseller-quality story from Joshua T. Calvert.
- Free with your Audible trial — keep the audiobook forever even if you cancel.
- Perfect for commutes, workouts, and relaxation. Listen anywhere, anytime.
Download: The Shackleton Signal
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The Shackleton Signal by Joshua T. Calvert is an immersive listening experience. Performed by Gary Tiedemann with a runtime of 11h22m, you can start with a free trial that you can cancel at any time. The audiobook remains yours forever, even if you end the trial.