George Bird Grinnell 
Jack the Young Trapper [EPUB ebook] 
An Eastern Boy’s Fur Hunting in the Rocky Mountains

Conservationist George Bird Grinnell helped tame the western U.S., establishing a number of national parks as tourism hubs. He brings this knowledge to bear in the "Jack" series of outdoor adventure stories for younger readers. In Jack the Young Trapper, Jack Danvers is recruited for a fur-trapping expedition in the treacherous territory of the Rockies.