Books like How to Own the Room
Viv Groskop
How to Own the Room is 240 pages, about 4 hours 24 minutes at 250 words a minute.
7 books to read next
How long each takes
How to Develop Self-confidence 4.5 h 
Public Speaking 8.5 h 
Write Better, Speak Better 13.4 h 
The Quick And Easy Way To Effective Speaking 3.8 h 
On Speaking Well 4.1 h 
Speak to Influence 3.4 h 
Principles of Public Speaking 5.6 h Bar height shows length. Estimated at 250 words a minute.