Books like Princess Buttercup
Wendy Cheyette Lewison
Princess Buttercup is 32 pages, about 35 minutes at 250 words a minute.
7 books to read next
How long each takes
Ten Magic Butterflies 42 min 
Bonjour, Butterfly 35 min 
The Princess in Black and the Perfect Princess Party 1.8 h 
I Want a Party! 35 min 
Party Princess 5.9 h 
The Princess Diaries, Volume VII 5.6 h 
Sweet Sixteen Princess 1.5 h Bar height shows length. Estimated at 250 words a minute.