Books like Manners Can Be Fun
Munro Leaf
Manners Can Be Fun is 48 pages, about 53 minutes at 250 words a minute.
6 books to read next
How long each takes
A Smart Girl's Guide to Manners 2.2 h 
Whoever You Are 35 min 
Richard Scarry's Please and Thank You Book 34 min 
Mind Your Manners 40 min 
Manners 35 min 
The Book of Languages 1.2 h Bar height shows length. Estimated at 250 words a minute.