Books like We Who Are About To...
Joanna Russ, Samuel R. Delany
We Who Are About To... is 170 pages, about 3 hours 7 minutes at 250 words a minute.
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How long each takes
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The Caves of Steel 4.5 h 
Death's End 13.3 h 
Star Trek Myriad Universes - Echoes and Refractions 8.9 h 
Pandora's Star 16.4 h 
Gateway 5.7 h 
Tiamat's Wrath 10.0 h 
Nemesis Games 10.0 h 
The Stars, Like Dust 4.2 h 
Record of a Spaceborn Few 6.6 h Bar height shows length. Estimated at 250 words a minute.