Few people hear about the settling of the Pacific Northwest by Indigenous Peoples, followed by Europeans that included even Spain in the short term. Author John Valiant writes about aspects of history that most people have not heard and he does so in The Golden Spruce.
Valiant is a completely thorough researcher that has dug out all of his information from written and oral histories, as well as from interviews. I doubt that he has left anything untouched in his work involving Haida Gwaii and a centuries-old magic tree killed without cause, except to a madman. The only thing he could add to the story is to have found the refugee cutter in some lair in the mountains or compound ala Bin Laden. Valiant is that thorough in his engaging work.
Someone out in the wilds of North America, a madman may still be hiding, but now everyone knows about him and will be on the lookout.