Books like Mystery of the Missing Map
Lois Walfrid Johnson
Mystery of the Missing Map is 143 pages, about 2 hours 37 minutes at 250 words a minute.
12 books to read next
How long each takes
Girl, Stolen 4.0 h 
Things Not Seen 4.6 h 
Who Was Helen Keller? 2.1 h 
Dear America 2.6 h 
Helen Keller 3.3 h 
Follow My Leader 3.5 h 
Helen Keller 1.8 h 
Out of Darkness 1.8 h 
Maggie by My Side 1.8 h 
Sees Behind Trees 1.9 h 
Louis Braille 1.5 h 
Count All Her Bones 4.2 h Bar height shows length. Estimated at 250 words a minute.