Books like Forty-two Years in the White House
Irwin Hood Hoover
Forty-two Years in the White House is 332 pages, about 6 hours 5 minutes at 250 words a minute.
12 books to read next
How long each takes
The Obamas 7.3 h 
Absolute Power 9.7 h 
John Adams 13.8 h 
Transfer of Power 10.1 h 
Washington 17.0 h 
The Path To Power 16.2 h 
The Rise of Theodore Roosevelt 16.3 h 
JFK and the Unspeakable 9.4 h 
Master of the Senate 22.0 h 
Once Upon a Secret 3.8 h 
No Ordinary Time 14.0 h 
Mornings on Horseback 8.2 h Bar height shows length. Estimated at 250 words a minute.