Books like The Mystery at the Ballpark
Gertrude Chandler Warner
The Mystery at the Ballpark is 86 pages, about 1 hour 35 minutes at 250 words a minute.
12 books to read next
How long each takes
The Bad Beginning 3.2 h 
Kristy's Big Day (The Baby-Sitters Club #6) 2.8 h 
Into the Gauntlet 5.7 h 
The Viper's Nest 3.2 h 
The Reptile Room 3.5 h 
The Wide Window 3.9 h 
The Miserable Mill 3.7 h 
The Emperor's Code 3.6 h 
Heat 4.0 h 
The End 6.8 h 
The Way to Stay in Destiny 3.3 h 
The Ersatz Elevator 4.8 h Bar height shows length. Estimated at 250 words a minute.