Through Siberia, The Land of the Future, by Fridtjof Nansen

This is a book documenting the journey of the Norwegian explorer through Siberia. The book is not a bushcraft tutorial, but much can be learned from its pages and a good number of photographs of the indigenous people. The book was published in 1914.

To the best of my knowledge, the book is in the public domain, and a copy can be obtained here, here, and a number of other places online.