Books like The Functional Art
Alberto Cairo
The Functional Art is 384 pages, about 7 hours 2 minutes at 250 words a minute.
7 books to read next
How long each takes
The Wall Street Journal Guide to Information Graphics 2.9 h 
Good Charts 4.7 h 
The Visual Display of Quantitative Information 3.6 h 
The Art of Game Design 11.2 h 
Presenting Your Findings 2.9 h 
Candlestick Charting Explained 5.5 h 
The Timetables of History 12.4 h Bar height shows length. Estimated at 250 words a minute.