Books like Great-grandpa's in the Litter Box
Dan Greenburg
Great-grandpa's in the Litter Box is 64 pages, about 1 hour 10 minutes at 250 words a minute.
12 books to read next
How long each takes
Dog Man 4.4 h 
Dog Man and Cat Kid 4.7 h 
Dog Man Unleashed 4.1 h 
Rising Storm 5.9 h 
A Map of Days 9.1 h 
Forest of Secrets 6.2 h 
The Incredible Journey 2.7 h 
The Sight 6.7 h 
Unforgiven 6.6 h 
Outcast 6.5 h 
Varjak Paw 4.7 h 
The Fourth Apprentice 6.8 h Bar height shows length. Estimated at 250 words a minute.