David MacKay FRS's book on sustainable energy is praised by leading figures in policy and industry. Tony Juniper, former Executive Director of Friends of the Earth, calls it compulsory reading for anyone influencing energy policy in government, business, or campaign groups. Robert Sansom of EDF Energy describes it as revealing the true facts about sustainable energy in a highly readable and entertaining form.

Cory Doctorow of boingboing.net likens it to 'The Freakonomics of conservation, climate and energy.' The Economist calls it a 'tour de force,' while Science magazine notes it delivers 'a cold blast of reality' and a 'must-read analysis.' The Guardian declares it 'this year's must-read book.' The work is lauded for making complex energy truths accessible and compelling to a broad audience.