It's a non-fiction book about "green capitalism, crises, climate change, and no end of growth in sight" (translation of German title). The authors give an overview over what the concepts "green capitalism" and "green new deal" mean, what their theoretical underpinning is and and what implications these concepts have on the world. Very importantly, they point out that a green new deal, is supposed to preserve nature and stop or slow down climate change, while at the same time fuels economic growth - which mechanisms are responsible for the pollution in the first place. They postulate that a sustainable future relies not on a green new deal or green capitalism, but on climate justice, just transition, and steady-state economy. Their points are laid out very understandably, and they provide the data and (scientific) literature they draw their conclusions on.