This book provides an overview of the current Internet of Things (loT) landscape, ranging from the research, innovation and development priorities to enabling technologies in a global context. A successful deployment of loT technologies requires integration on all layers, be it cognitive and semantic aspects, middleware components, services, edge devices/machines and infrastructures. It is intended to be a standalone book in a series that covers the Internet of Things activities of the IERC Internet of Things European Research Cluster from research to technological innovation, validation and deployment. The book builds on the ideas put forward by the European Research Cluster and the loT European Platform Initiative (loT-EPI) and presents global views and state of the art results on the challenges facing the research, innovation, development and deployment of loT in the next years. The IoT is bridging the physical world with virtual world and requires sound information processing capabilities for the "digital shadows" of these real things. The research and innovation in nan electronics, semiconductor, sensors/actuators, communication, analytics technologies, 'cyber-' physical systems, software, swarm intelligent, and deep learning systems are essential for the successful deployment of loT applications. The emergence of loT platforms with multiple functionalities enables rapid development and lower costs by offering standardised components that can be shared across multiple solutions in many industry verticals. The loT applications will gradually move from vertical, single purpose solutions to multi-purpose and collaborative applications interacting across industry verticals, organisations and people, being one of the essential paradigms of the digital economy. Many of those applications still have to be identified and involvement of end- users including the creative sector in this innovation is crucial. The loT applications and deployments as integrated building blocks of the new digital economy are part of the accompanying loT policy framework to address issues of horizontal nature and common interest (i.e. privacy, end-to-end security, user acceptance, societal, ethical aspects and legal issues) for providing trusted IoT solutions in a coordinated and consolidated manner across the loT activities and pilots. In this, context loT ecosystems offer solutions beyond a platform and solve" important technical challenges in the different verticals and across verticals. These loT technology ecosystems are instrumental for the deployment of large pilots and can easily be connected to or build upon the core IoT solutions for different applications in order to expand the system of use and allow new and even unanticipated IoT end uses. Technical topics discussed in the book include: Introduction; Digitising industry and loT as key enabler in the new era of Digital Economy; loT Strategic Research and Innovation Agenda; loT in the digital industrial context: Digital Single Market. Integration of heterogeneous systems and bridging the virtual, digital and physical-florlds; Federated loT platforms and interoperability; Evolution from intelligent devices to connected systems of systems by adding new layers of I cognitive behaviour, artificial intelligence and user interfaces; Innovation through IOT ecosystems; Trust-based loT end-to-end security, privacy framework; User acceptance, societal, ethical aspects and legal-issues; Internet of Things Applications.