Sometimes humorous. Sometimes serious. Always nonfiction.
The Black Count: Glory, Revolution, Betrayal, and the Real Count of Monte Cristo  by Tom Reiss.
The Devil in the White City: Murder, Magic, and Madness at the Fair That Changed America  by Erik Larson.
Blue Highways: A Journey into America  by William Least Heat-Moon.
Guns, Germs and Steel: The Fates of Human Societies  by Jared M. Diamond.
The Botany of Desire: A Plant's Eye View of the World  by Michael Pollan.
The Guns of August  by Barbara Wertheim Tuchman.
October 1964  by David Halberstam.
A History of the World in 6 Glasses  by Tom Standage.
The Ghost Map: The Story of London's Most Terrifying Epidemic and How It Changed Science, Cities, and the Modern World  by Steven Johnson.