Books like Lives of the Necromancers
William Godwin
Lives of the Necromancers is 282 pages, about 5 hours 10 minutes at 250 words a minute.
12 books to read next
How long each takes
Witches 3.5 h 
Harry Potter and the Philosopher's Stone 5.6 h 
The Encyclopedia of Witches and Witchcraft 7.7 h 
The Magician 4.7 h 
The Night Circus 9.4 h 
The Witching Hour 17.7 h 
Witch 6.4 h 
Witch's Broom 5.6 h 
The Witches Book Of The Dead 5.3 h 
The Atlas Six 7.3 h 
Stardust 4.4 h 
Taltos 8.9 h Bar height shows length. Estimated at 250 words a minute.