The Devil in the White City by Erik Larson. New York Times best seller. This book masterfully combines the true stories of a serial killer and the 1893 Chicago World's Fair (so many "firsts" and connections to later acheivements of well know men). All spoken words are verified from written sources, but it reads like a fast-paced novel. Larson paints an incredible picture of the time period.
Thunderstruck by Erik Larson. This isn't my favorite of Larson's books; however, it is an interesting look at the development of Marconi's wireless and the politics behind the success/failure of the invention, while also weaving in the story of Crippen, a man who murdered his psychologically abusive wife, which is what made wireless popular, when many doubted its usefulness.