Books like In the Ocean of Night
Gregory Benford
In the Ocean of Night is 333 pages, about 6 hours 6 minutes at 250 words a minute.
12 books to read next
How long each takes
Titan 10.9 h 
Contact 7.9 h 
An Astronauts Guide to Life on Earth 5.6 h 
To Be Taught, If Fortunate 2.8 h 
Gateway 5.7 h 
Children of the Mind 7.0 h 
The Hitchhiker's Guide to the Galaxy 4.0 h 
Aliens 4.7 h 
The Voyage of the Space Beagle 3.7 h 
Footfall 9.8 h 
Communion 5.5 h 
The Gripping Hand 7.5 h Bar height shows length. Estimated at 250 words a minute.