Books like Mysterious Hideaway
Lois Walfrid Johnson
Mysterious Hideaway is 158 pages, about 2 hours 54 minutes at 250 words a minute.
6 books to read next
How long each takes
The Runaway Friend 53 min 
Hangman's Curse 5.3 h 
Escape from the Island of Aquarius 2.9 h 
Tombs of Anak 2.6 h 
Trapped at the Bottom of the Sea 2.6 h 
Mandie and the Abandoned Mine 2.9 h Bar height shows length. Estimated at 250 words a minute.