Books like Understanding Exposure
Bryan F. Peterson, Bryan Peterson
Understanding Exposure is 160 pages, about 2 hours 56 minutes at 250 words a minute.
9 books to read next
How long each takes
The New Zone System Manual 2.6 h 
A World History of Photography 12.9 h 
Photography 7.7 h 
Read This If You Want To Take Great Photographs 2.4 h 
I Wrote This for You 4.0 h 
The Photographer's Eye 3.5 h 
The Photographer's Eye 2.9 h 
Light-- Science and Magic 5.9 h 
Camera 6.7 h Bar height shows length. Estimated at 250 words a minute.