This book was an odd combination of memoir, position paper, and technical exposition.
The authors draw from their experience working on the Integral Fast Reactor to address the possibilities of the technology. The argument is quite convincing, though I'm sure there are easier summations available elsewhere.
The anti-nuclear lobby and environmentalism make for quite odd bedfellows. Given the enormous damage that fossil fuel burning is causing right now, environmentalists are in direct opposition to the only energy form that could possibly replace it in the next 50 years. No other technology holds the potential yet.
The book is a very lucid explanation of the history, advantages, disadvantages, and technical/political challenges facing the adoption of this particular form of nuclear power. However, the book can get extremely technical, so it's definitely not light reading for someone just coming to the subject of nuclear power.