James Hansen's book is very easy to read even for the general public, except for some scientific parts he warns his readers for. Compared with other books about global warming, this book is written by an author with personal experience both in the top climate science and in the politics around climate change. The scientific details are very complete with references to even more detailed articles on his website. The books leaves me with a complete overview about all the dimensions of the science of global warming, and it further completes the picture of global warming for me. A new frightening dimension I learned about is the possibility, even on the short term, of severe storms due to an increasing air humidity and an increasing difference between warm and cold air systems.
It also scares me to read the how political appointees at the US president offices determine about the future of our grandchildren by controlling and censuring climate science. And even with the Obama there is not much hope......
The additional value of this book is in its very personal touch by the author.
However, to me there is still one essential piece of the climate puzzle missing. Even Hansen assumes that humanity will continue to live as we are doing now, he only addresses the population problem, in the same consumerism lifestyle and global economic system that are proving not to be sustainable. We are not only emitting greenhouse gasses but we are also depleting other resources and we live in system of intrinsic social injustice at a massive scale.