Books like Comet in Moominland
Tove Jansson
Comet in Moominland is 175 pages, about 3 hours 13 minutes at 250 words a minute.
8 books to read next
How long each takes
Karlsson on the Roof 2.6 h 
Emil in the Soup Tureen 2.1 h 
The Brothers Lionheart 4.2 h 
Karlson Flies Again 2.5 h 
The Marvelous Land of Oz 3.2 h 
Mary Poppins Comes Back 5.1 h 
Mary Poppins Opens the Door 4.7 h 
Mary Poppins in Cherry Tree Lane 1.7 h Bar height shows length. Estimated at 250 words a minute.