Earthmasters: The Dawn of the Age of Climate Engineering by Dr Clive Hamilton
an unavoidable discussion
Hamilton claims that he wrote this book because there was a dangerous gap in commentary about humanity's options if it did not reduce the burning of fossil fuel. He's right, and this book begins to fill the gap. It classifies technologies according to whether they remove carbon dioxide from the atmosphere or reduce tropospheric heating. His discussion of the measures he considers most likely (as distinct from most feasible) is reasonably complete. Hamilton examines the constraints (legal and practical), the risks (significant) and the possible outcomes. Importantly, he pulls no punches in teasing apart the motives and track records of the proponents of such grand schemes as liming the oceans, seeding the atmosphere and more. While there might be approaches he does not cover completely, such as implementation of multiple technologies, he succeeds in alerting his readership to a looming issue. I have seen him put his views in a hall full of scientific experts and they hold up well.
The final two chapters, "Ethical anxieties" and "This Goodly Frame", indulge in a little philosophical and historical navel-gazing. They are of interest but lack the urgency of the early discussion. The Notes, including references, are excellent, current and reflect Hamilton's long term familiarity with climate change issues.