Book 10 of The Three Investigators · 1968
The Mystery of the Moaning Cave
by Michael Collins. 160 pages, about 2.9 hours to read. Rated 3.5 out of 5 by 2 Open Library readers.
Borrow it free
Open Library lends a digital copy free, one reader at a time, with a free account.
Buy a used copy
Used paperbacks of popular series usually go for a few dollars or pounds. Compare before you buy:
We may earn a commission if you buy through these links. It doesn't change the price.
How long to read The Mystery of the Moaning Cave
At 250 words a minute, the average adult pace, The Mystery of the Moaning Cave takes about 2.9 hours. That assumes 275 words a page over 160 pages.
| Your pace | Time |
|---|---|
| 150 words/min (slow, or reading aloud) | 4.9 hours |
| 200 words/min | 3.7 hours |
| 250 words/min (average) | 2.9 hours |
| 300 words/min | 2.4 hours |
| 400 words/min (fast) | 1.8 hours |
In the series
- Before this9. The Mystery of the Screaming Clock
- This book10. The Mystery of the Moaning Cave
- Next11. The Mystery of the Talking Skull
All 18 The Three Investigators books in order
Children: Grades 4-6 · mystery and detective stories · juvenile fiction · detective and mystery stories · diamonds · Children's stories