Books like Four Moons of Darkover
Marion Zimmer Bradley
Four Moons of Darkover is 307 pages, about 5 hours 38 minutes at 250 words a minute.
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The October Country 5.6 h 
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Dreamsongs, Volume II 10.9 h 
We'll Always Have Paris 3.8 h 
Orsinian Tales 3.5 h Bar height shows length. Estimated at 250 words a minute.