It is a strong argument in favor of plant-based diets and focuses on the risks and the negative impact of animal-proteins on health. It is more about the science of vegan diets than Eat to Live by Joel Fuhrman. For people who might be slightly turned-off by the sometimes salesy tone of Eat to Live, The China Study might be a better first book to read.
The China Study is an amazing argument with a large array of citations and references to supporting studies. The book also goes into the politics and the issues that cause the argument to continue to be called "controversial" by many. He shares war stories of meat and dairy industry interests getting in the way of an objective dialog and actively sabotaging and "spinning" the debate.
When I worked at Energy Conversion Devices, there was a similar resistance to alternative energy and I know all too well how effective this kind of active campaigning against disruptive science can be.
I am fairly convinced by the book that there is an active interest by those in power to prevent the public from consuming less meat and dairy and believe that information about nutrition and it's impact on our health is being prevented from reaching the public as well as our doctors. The book has provided additional incentive for me to look into the cited sources as well as explore how information about nutrition is reaching my friends in the medical profession.
I strongly suggest you read this book if you have any interest in health, diet and medicine.
EDIT: I should probably add, since people ask, the origin of the title. The author of the book was involved a massive "survey of diseases and lifestyle factors in rural China and Taiwan" and describes and cites this study in the book.