The story what we now discuss about has been told in two different books; first one is "Ihmismetsästäjiä ja erämiehiä". and the second one "Vanhat kalajumalat".The author is K.M. Wallenius.
The first one has been translated to sweden and german language, but not in english. The german language book is: Menschenjäger und Fallensteller. Fahrten und Streiffzüge durch die Wildmarken Lapplands. Übersetzt von Rita Öhquist und prof. Kolster. Leipzig-Berlin 1944. Lühe Verlag.

The author was general in finnish army. Here link to Wikipedia article which you could tranlate in english with GOOGLE:

http://fi.wikipedia.org/wiki/K._M._Wallenius