Organisations face a number of questions when they are considering their energy efficiency such as why is your company’s electricity bill high? Have you established your company’s energy priorities, and have you considered how the weather conditions can impact on your company’s energy consumption? Are photovoltaic, wind, or biomasses viable solutions to consider for an organisation which wants to put in place an innovative programme of energy efficiency? Have you engaged your staff to support the company’s energy consumption? To these and more questions John Ryan’s book gives coherent, timely answers.