Books like The Reluctant Dragon
Kenneth Grahame, Jim Weiss, Ernest H. Shepard, Michael Hague
The Reluctant Dragon is 40 pages, about 44 minutes at 250 words a minute.
12 books to read next
How long each takes
Lost Continent 6.2 h 
The Little Prince 1.8 h 
Dragonsong 3.6 h 
The Dragonet Prophecy 5.9 h 
Dealing with Dragons 4.0 h 
Winter Turning 6.2 h 
Farmer Giles of Ham 1.7 h 
Moon Rising 7.1 h 
The Book of Dragons 2.1 h 
Wayward Son 7.6 h 
Calling on Dragons 4.5 h 
Talking to Dragons 4.7 h Bar height shows length. Estimated at 250 words a minute.