WWF is one of the most recognizable international environmental non-governmental organizations (IENGOs) in the world. The Arctic has become one of the organization’s key focus areas in the twenty-first century, but what the general public is less aware of is the fact that WWF has been involved in its northern work for decades. The introduction outlines the book’s rationale and approach for investigating the work of WWF in the Arctic and the North and how it has built its role in regional discussions and decision-making in order to engage different local, national, regional and international audiences.