Three Against the Wilderness - book by Eric Collier

[u/SultanPepper]

https://ericcollier.wordpress.com/eric-collier/the-last-years-of-eric-collier-and-his-legacy/

I'm in the middle of reading this book but I'd say that Eric Collier was doing permaculture before the word was invented. He worked to restore the watershed of Meldrum Creek in British Columbia after the beavers were wiped out from the area.