Books like River Secrets
Shannon Hale
River Secrets is 304 pages, about 5 hours 34 minutes at 250 words a minute.
6 books to read next
How long each takes
Watership Down 8.8 h 
A River Ran Wild: An Enironmental History 39 min 
The Rabbits 35 min 
Princess Mononoke 3.2 h 
The Little Grey Men 4.6 h 
Mother Earth and Her Children 35 min Bar height shows length. Estimated at 250 words a minute.