Smart appliances (SAs) and other connected devices, together with smart communities (SCs)—which enable energy consumers to pursue common goals through cooperation and coordinated behaviour within the framework of the Internet of things (IoT)—have raised expectations regarding deployment of the information and communication technologies (ICTs) to encourage uptake of demand response (DR) energy efficiency programmes. DR programmes pursue a reduced carbon footprint, balanced supply and demand, and behavioural change in consumers. The book provides sustainable evidence of ICT-supported energy management that can help consumers flexibly manage demand through the formation of sustainable SCs that maximise renewable energy use through large-scale cooperative management mechanisms. SCs cooperating securely in identifying consumption patterns can foster sustainable and efficient energy use, with the outcome of benefits for the participants and for the environment.