Books like The First Mouse on the Moon
Gerónimo Stilton
The First Mouse on the Moon is 55 pages, about 1 hour 1 minute at 250 words a minute.
12 books to read next
How long each takes
Lost Moon 6.9 h 
A Man on the Moon 12.6 h 
First Man 14.4 h 
First on the Moon 8.0 h 
Apollo 8 5.9 h Rocket Men 7.0 h 
The Adventures of Ook and Gluk, Kung Fu Cavemen from the Future 3.2 h 
Babymouse 1.7 h 
Sex Criminals 2.4 h 
Gravity Falls 5.3 h 
Krazy Kat 2.2 h 
The Invisibles 4.2 h Bar height shows length. Estimated at 250 words a minute.