The Books Insiderindependent audiobook data
Trouble on the Hidden Moon (An unexpected Adventure in Outer Space) by J. S. Keim

Trouble on the Hidden Moon (An unexpected Adventure in Outer Space): Audiobook

Book 3 of the Hidden Moon series

According to The Books Insider's catalog data, the Trouble on the Hidden Moon (An unexpected Adventure in Outer Space) audiobook runs 2.7 hours unabridged, narrated by Charles Hubbell (about 1.8 hours at 1.5× playback speed).

2.7listening hrs
Fantasystore shelf
2026released
Free for new listeners

The instrument When will you finish it?

Based on 2.7 hours of listening.

Days to finish Trouble on the Hidden Moon (An unexpected Adventure in Outer Space) at common listening paces
Your paceYou'll finish in
30 min / day6 days
1 hour / day3 days
2 hours / day2 days
1 hour / day at 1.5×2 days

Part of The Audiobook Finish-Time Calculator: the same instrument for any audiobook we measure.

What our data says

  • At 2.7 hours, it is shorter than 88% of the 12,109 Fantasy audiobooks in our catalog.

Catching up on The Hidden Moon Series

This is book 3. Books 1 to 2 run 5.9 hours before it; books 1 to 3 run 8.6 hours in all.

About as long, on the Fantasy shelf

225 Fantasy audiobooks in our catalog run within 10% of this length. The most popular on the store:

Computed from 409,794 English-language unabridged audiobooks in The Books Insider catalog (store data read November 3, 2026). Lengths are the store's own running times. Methodology.

About this listen

Trouble on the Hidden Moon (An unexpected Adventure in Outer Space) is book 3 of J. S. Keim's Hidden Moon series: a 2.7-hour unabridged recording, read by Charles Hubbell, released June 4, 2026, on the Fantasy and Mystery & Fantasy shelves.

The listen at a glance

Length
2.7 hrs
Narrated by
Charles Hubbell
Released
June 4, 2026
Format
Unabridged audiobook
Language
English
Store shelves
Fantasy, Mystery & Fantasy
Series
The Hidden Moon Series #3
ISBN
9780466344429

How to listen to Trouble on the Hidden Moon (An unexpected Adventure in Outer Space) free

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Questions listeners ask

How long is the Trouble on the Hidden Moon (An unexpected Adventure in Outer Space) audiobook?

Trouble on the Hidden Moon (An unexpected Adventure in Outer Space) runs 2.7 hours unabridged. At 1.5× speed that drops to roughly 1.8 hours.

Is the Trouble on the Hidden Moon (An unexpected Adventure in Outer Space) audiobook free?

Yes, for new listeners: the trial starts you with three free audiobooks.

Who narrates Trouble on the Hidden Moon (An unexpected Adventure in Outer Space)?

Trouble on the Hidden Moon (An unexpected Adventure in Outer Space) is narrated by Charles Hubbell.