Books like The Mystery of the Galloping Ghost
Kathryn Kenny
The Mystery of the Galloping Ghost is 171 pages, about 3 hours 8 minutes at 250 words a minute.
9 books to read next
How long each takes
Trixie Belden and the Red Trailer Mystery 4.5 h 
Ghost Hunters 4.0 h 
Ghost Stories of an Antiquary 2.9 h 
Green Calder Grass 6.3 h 
Graveyard 4.1 h 
The Black Hope Horror 4.7 h 
The Presence 7.8 h 
The Legend of the Ghost Dog 3.7 h 
The Allingham Minibus 4.4 h Bar height shows length. Estimated at 250 words a minute.