Ecodefense: A Field Guide to Monkeywrenching is a book edited by Dave Foreman (and Bill Haywood in later editions), with a foreword by Edward Abbey.
Much of the inspiration for the book, as well as the term “monkeywrenching”, came from Edward Abbey’s 1975 novel The Monkey Wrench Gang. Other inspiration for the book likely came from the 1972 book Ecotage!, which was published by the group Environmental Action and was in turn inspired by the actions of an activist in the Chicago, Illinois area who called himself “The Fox”, and engaged in such vigilante actions to protect the environment as plugging smokestacks. The Fox named after the Fox River northwest of Chicago was an avid historical boater who educated and demonstrated Native American and early trapper fishing and boating techniques.