Books like Promise of the Witch King
R. A. Salvatore
Promise of the Witch King is 341 pages, about 6 hours 15 minutes at 250 words a minute.
12 books to read next
How long each takes
Fire & Blood 16.1 h 
A Song of Ice and Fire 26 min 
The World of Ice & Fire 6.1 h 
Stone of Tears 14.1 h 
The Way of Kings 18.5 h 
The Gypsy Morph 7.4 h 
Oathbringer 22.8 h 
The Well of Ascension 14.4 h 
The Amber Spyglass 10.0 h 
The Sword of Shannara 13.3 h 
Shroud of Eternity 9.7 h Havoc 7.3 h Bar height shows length. Estimated at 250 words a minute.