Books like The Important Book
Margaret Wise Brown
The Important Book is 24 pages, about 26 minutes at 250 words a minute.
12 books to read next
How long each takes
Goodbye Summer, Hello Autumn 36 min 
Dr. Seuss's ABC 1.2 h 
Press Here 1.0 h 
Mind Your Manners 40 min 
Stone Soup 53 min 
Busy! 13 min 
Best Word Book Ever 1.3 h 
Kitten's Day Out 18 min 
The Pout-Pout Fish 26 min 
Blueberries for Sal 59 min 
City Shapes 44 min 
A Hole Is to Dig 53 min Bar height shows length. Estimated at 250 words a minute.