Books like The Permaculture Garden
Graham Bell
The Permaculture Garden is 170 pages, about 3 hours 7 minutes at 250 words a minute.
7 books to read next
How long each takes
The Botany of Desire 5.5 h 
Organic Gardening for Dummies 6.6 h 
Gaia's Garden 4.2 h 
Wicked Plants 4.3 h 
Teaching a Stone to Talk 3.3 h 
A Brief History of Earth 5.0 h 
The Serengeti Rules 5.2 h Bar height shows length. Estimated at 250 words a minute.