Books like Geosystems
Robert W. Christopherson
Geosystems is 660 pages, about 12 hours 6 minutes at 250 words a minute.
9 books to read next
How long each takes
Physical Geography 11.2 h 
Physical Geography 10.8 h 
Introducing Physical Geography 11.8 h 
Physical Geography 15.0 h 
Geomorphology 8.3 h 
Modern Physical Geography 16.7 h 
The Earth 13.5 h Physical Geology 12.3 h 
Discovering Physical Geography 12.0 h Bar height shows length. Estimated at 250 words a minute.