Books like This Is Your Mind on Plants
Michael Pollan
This Is Your Mind on Plants is 274 pages, about 5 hours 1 minute at 250 words a minute.
6 books to read next
How long each takes
Pharmako/gnosis 7.0 h 
The Magical and Ritual Use of Herbs 2.4 h Legally Stoned 4.3 h 
The Encyclopedia of Psychoactive Plants 17.3 h 
Pharmakodynamis 5.4 h 
The Chemical Muse 4.5 h Bar height shows length. Estimated at 250 words a minute.