This book sets out a vision of intelligent spaces & describes the progress that has been made towards realisation. The context for Intelligent Spaces (or iSpaces) is the world where ICT (Information & Communication Technology) & sensor systems disappear as they become embedded into physical objects & the spaces in which we live, work & play. The ultimate vision is that this embedded technology provides us with intelligent & contextually relevant support, augmenting our lives & experience of the physical world in a benign & non-intrusive manner. The ultimate vision is challenging, there are technical barriers, especially in the integration of complex systems & in the creation of intelligent software, as well as social & economic barriers. This book explores what is technically possible & what users will need for the future. Academic & industrial researchers in Computer Science, IT & Communications, as well as practitioners will find this key reading as it delivers practical & implementable current research.