Books like The Wicca Source Book
Gerina Dunwich
The Wicca Source Book is 237 pages, about 4 hours 21 minutes at 250 words a minute.
12 books to read next
How long each takes
A Charmed Life 3.5 h 
Witch 2.6 h 
To Ride a Silver Broomstick 5.5 h 
The Wicca Handbook 5.7 h 
Wicca For Life 6.3 h 
Drawing Down the Moon 10.8 h 
Earth Magic 3.8 h 
Modern Wicca 6.2 h 
The Way of the Hedge Witch 4.7 h 
The Wiccaning 4.9 h 
Llewellyn's 2016 Witches' Companion 5.3 h 
The Witch Book 11.4 h Bar height shows length. Estimated at 250 words a minute.