Northwest Passage is an historical novel by Kenneth Roberts, published in 1937. Told through the eyes of primary character Langdon Towne, much of the novel follows the exploits and character of Robert Rogers, the leader of Rogers' Rangers, who were a colonial force fighting with the British during the French and Indian War. No. 1 on The New York Times Fiction best seller list for 11 weeks, from the issue of July 19, 1937. Wiki link