Books like The Witches of Karres
James H. Schmitz
The Witches of Karres is 344 pages, about 6 hours 18 minutes at 250 words a minute.
12 books to read next
How long each takes
The Algebraist 9.2 h 
Waldo and Magic, Inc 3.7 h 
Dawn 4.7 h 
From the Earth to the Moon 3.8 h 
Alien: Out of the Shadows 5.6 h 
Rama II 9.1 h 
Orphans of the Sky 2.4 h 
Yesterday's Son 3.5 h 
The Wizard of Karres 8.2 h 
Spock's World 5.7 h 
Star Trek 4.6 h 
Non-Stop 4.6 h Bar height shows length. Estimated at 250 words a minute.