I'm currently reading The Devil in the White City by Erik Larson
True accounts of the lives of two men who both lived around the late 19th century. One was the driving force behind the architecture and engineering of the 1983 Chicago World's Fair, the other took the fair as an opportunity to open a hotel just west of it to lure young women in to murder them. The juxtaposition of great human achievement with unbridled evil makes for a really compelling read and it's the first book in the longest time that I actually look forward to reading again when I have to take a break.
I'm posting the cover design too because I think it's so good. It really evokes the atmosphere within.