Murderer. Salesman. Pirate. Adventurer. Cannibal. Co-founder of the Hudson's Bay Company. Known to some as the first European to explore the upper Mississippi, and widely as the namesake of ships and hotel chains, Pierre-Esprit Radisson is perhaps best described, writes Mark Bourrie, as “an eager hustler with no known scruples.” Kidnapped by Mohawk warriors at the age of fifteen, Radisson assimilated and was adopted by a powerful family, only to escape to New York City…