The goal of the Desktop Grid Computing is to offer a synthesis on various approaches in Desktop Grid Computing, a decade after the pioneering work. Desktop Grids use computing, network and storage resources of idle desktop PCs distributed over multiple LANs or the Internet. Today, this type of computing platform forms one of the largest distributed computing systems, and currently provides scientists with tens of TeraFLOPS from hundreds of thousands of hosts. Several topics will be discussed in details, which may appeal to a much larger audience than the community of researcher in the field. DGC is certainly the first book that makes a deep comprehensive and up-to-date presentation about the topic. It also draws perspectives, recent trends in the domain that underline the evolution of the initial concept.