Books like Five Go Off in a Caravan
Enid Blyton
Five Go Off in a Caravan is 192 pages, about 3 hours 31 minutes at 250 words a minute.
11 books to read next
How long each takes
Danny, The Champion of the World 3.9 h 
The Boy Who Swam with Piranhas 4.3 h 
Russian Roulette - Alex Rider #10 7.0 h 
The Princess in Black Takes a Vacation 1.8 h 
Masterminds 6.2 h 
The Circus 1.0 h 
The Green Slime 57 min 
The Boundless 6.1 h 
Dreadnought 5.6 h 
The Switch 3.5 h 
Hurricane Gold 6.8 h Bar height shows length. Estimated at 250 words a minute.