Book excerpt: This book explores a key technology regarding the importance of connections via an Internet of Things network and how this helps us to easily communicate with others and gather information. Namely, what would happen if this suddenly became unavailable due to a shortage of power or electricity? Using thermoelectric generators is a viable solution as they use the heat around us to generate the much-needed electricity for our technological needs. This second volume on the challenges and prospects of thermoelectric generators covers the reliability and durability of thermoelectric materials and devices, the effect of microstructures on the understanding of electronic properties of complex materials, thermoelectric nanowires, the impact of chemical doping or magnetism, thermoelectric generation using the anomalous Nernst effect, phonon engineering, the current state and future prospects of thermoelectric technologies, transition metal silicides, and past, present and future applications of thermoelectrics.