Devil in the White City by Erik Larson: the long and short of it is that it tells the parallel stories of the Columbian Exposition in Chicago at the end of the nineteenth century and the exploits of H.H. Holmes, a serial killer and all-around creep in sheep's clothing. Larson takes a little bit of liberty and really creates a narrative with the facts that he unearthed to make it a compelling read.
Fall of Giants by Ken Follett. "Fall of Giants is Follett's magnificent new historical epic. The first novel in The Century Trilogy, it follows the fates of five interrelated families—American, German, Russian, English, and Welsh—as they move through the world-shaking dramas of the First World War, the Russian Revolution, and the struggle for women's suffrage."