Books like Cherry Ames, Jungle Nurse
Helen Wells
Cherry Ames, Jungle Nurse is 176 pages, about 3 hours 14 minutes at 250 words a minute.
7 books to read next
How long each takes
Five Go to Smuggler's Top 3.5 h 
The Scarlet Slipper Mystery 3.3 h 
The Pet Shop Mystery 2.2 h 
The Smuggler's Treasure 3.0 h 
Ghosts of Greenglass House 8.5 h 
The Smuggler's Secrets 4.0 h 
The Twisted Claw 3.5 h Bar height shows length. Estimated at 250 words a minute.