What the prospective reader needs to know about THIS CHANGES EVERYTHING is that it is over 450 pages of 9-point type with 60 pages of endnotes of 7-point type -- which is to say this is not a light easy read, even though Klein is a gifted writer. It took a triumph of the will for me to finish it. The book swirls and eddies, shoots like a rocket and then floats back down to earth. Klein tosses in everything but the kitchen sink. The first half the book is the conventional narrative: the climate-change-denial industry vs. the scientific consensus. The hinge of the book is a fascinating look at the "super-tech will save us" field of geoengineering. The last half is the most compelling. Klein talks about "Blockadia," her term for local citizen resistance to behemoth corporate extractivist industry. She talks about Keystone XL and the role of Indigenous peoples in the climate justice movement. She talks about her own difficulties in getting pregnant and the Deepwater Horizon catastrophe. In the end she compares the movement to address climate change to the abolition movement of the 19th century, an analogy which lets us know there is plenty of bloodshed to come.