Books like Witches' Sabbath
Charity Blackstock
Witches' Sabbath is 188 pages, about 3 hours 27 minutes at 250 words a minute.
12 books to read next
How long each takes
A Voice in the Dark 4.4 h 
Detection Unlimited 6.3 h 
The Master of Phoenix Hall 4.4 h 
The Housemaid 6.2 h 
Lights Out 7.6 h Tregaron's Daughter 5.7 h 
Never Lie 6.0 h 
Does It Hurt? 7.9 h 
Stormswift 7.6 h 
Dracul 9.5 h 
A Heritage of Shadows 5.9 h 
Black Sheep 4.7 h Bar height shows length. Estimated at 250 words a minute.