Books like The Pill Book
Harold M. Silverman
The Pill Book is 1,280 pages, about 23 hours 28 minutes at 250 words a minute.
8 books to read next
How long each takes
Mushrooms 5.6 h 
The Paradiso 7.7 h 
The Merck Index 49.7 h 
Plant Identification Terminology 3.7 h 
All That the Rain Promises and More... 5.1 h 
DK Handbooks 5.6 h 
Snakes of India 8.8 h 
The Fashion Book 10.1 h Bar height shows length. Estimated at 250 words a minute.