The book includes chapters on natural gas, coal, tar sands and heavy oils, oil shale, uranium, and (although not strictly an energy resource itself) hydrogen. A concluding chapter on the overall energy picture covers the likely mix of energy sources the world can rely on for the near-term future, and the special roles that will need to be played by conservation, high-mileage diesel automobiles, nuclear power plants, and wind-generated electricity.

An acknowledged expert in the field, Deffeyes brings a deeply informed, yet optimistic approach to bear on the growing debate. His main concern is not our long-term adaptation to a world beyond oil but our immediate future: Through our inattention, we have wasted the years that we might have used to prepare for lessened oil supplies. The next ten years are critical.