One might anticipate a travelogue from a title like The Wilderness of the Upper Yukon; but such would actually be a wrong guess. This is a combination of scientific study of the wild sheep of Yukon Territory from 1904 to 1905 and a hunting saga and comes from the unusual perspective of a hunter interested in natural history and hunting adventure alike. Sheldon traveled by steamboat, canoe, pack horses and on foot and encountered explorers in the course of his investigations. Nearly 100 black and white photos and paintings from the trip, four detailed travel maps, and a wealth of wild sheep natural history accompanies his hunting stories. The result is a dual recommendation for sportsmen and naturalists alike: an unusual marriage between the two? Surprisingly the two are often entwined: consider Ducks Unlimited, for example. This concept is reinforced in a lively read recommended for any audience able to appreciate a hunter's enjoyment of nature.

– D. Donovan, Senior eBook Reviewer, Midwest Book Review