The Dakota Cipher

William Dietrich is back with another fast-paced new adventure — one that brings together Norse mythology, the American wilderness, and a swashbuckling explorer in an irresistible page-turner.Ethan Gage, the hero of Napoleon's Pyramids and The Rosetta Key, just wants to enjoy the fruits of victory after helping Napoleon win the Battle of Marengo and end an undeclared naval war with the United States.But a foolish tryst with Bonaparte's married sister and the improbable schemes of a grizzled Norwegian named Magnus Bloodhammer soon send Ethan on a new treasure hunt on America's frontier that…