Books like The Magic Bed-Knob
Mary Norton
The Magic Bed-Knob is 189 pages, about 3 hours 28 minutes at 250 words a minute.
12 books to read next
How long each takes
Witch's Pyre 7.0 h 
Witch's Business 3.4 h 
Secret Spells & Curious Charms 34 min 
Half Wild 7.0 h 
Dark Magick 3.5 h 
The Key To Rondo 6.4 h 
Hex Hall 5.9 h 
Spellbound 3.5 h 
Juniper 3.6 h 
The Worst Witch Strikes Again 1.7 h 
Howl's Moving Castle 5.6 h 
After Candlemas 2.2 h Bar height shows length. Estimated at 250 words a minute.