Climate change is the greatest single problem we face as a planet. This important introduction skilfully guides us through the complex mix of scientific, political, social, and environmental issues to examine the manifold threats it poses and explore the possible futures for our world. Focusing on the fact that the point of no return, may in fact have already been passed, Boyd and Tompkins highlight the urgent need to start actively adapting to our changing climate if we want to avoid complete catastrophe.