Books like A Fire Upon the Deep
Vernor Vinge
A Fire Upon the Deep is 605 pages, about 11 hours 6 minutes at 250 words a minute.
12 books to read next
How long each takes
A Canticle for Leibowitz 5.9 h 
The Moon Is a Harsh Mistress 6.1 h 
Ringworld 6.2 h 
Stand on Zanzibar 10.6 h 
Altered Carbon 8.8 h 
The Foundation Trilogy 11.1 h 
The Robots of Dawn 8.2 h 
Stranger in a Strange Land 8.0 h 
Hyperion 8.8 h 
Blue Mars 14.4 h 
Prelude to Foundation 8.1 h 
The Snow Queen 8.9 h Bar height shows length. Estimated at 250 words a minute.