Grey Owl 
The Adventures of Sajo and her Beaver People [EPUB ebook] 

The Adventures of Sajo and her Beaver People is a 1935 children's adventure novel, written by Canadian author Grey Owl. It was based on the real-life events. The novel became a best seller, and contributed to drawing half a million people to Grey Owl's lectures in the late 1930s. Within five years of its publication, it was translated into many European languages, including Polish and Russian.
Sajo, a young Ojibwe Indian girl, and her older brother adopt two young beavers, Chilawee and Chikanee, and try to save them from fur traders.