Book excerpt: This unique comprehensive collection presents the latest multi-disciplinary research in strategic digital outsourcing and digital business strategy, providing a management decision-making framework for successful long-term relationships and collaboration based on trust and governance. Part I: Innovation in Business Models and Digital Outsourcing takes an internal company perspective on strategic digital outsourcing, and the importance of trust in outsourcing relationships. Part II: Inter-organizational Relations and Transfer explores topics underpinning service recipients and service suppliers' relationships including governance, knowledge transfer and legal aspects. Part III: From On-site to Cloud discusses the challenges presented by moving to a cloud environment, including risks and controls. Part IV: Developments to Come explores emerging technologies and their impact on digital outsourcing such as blockchain and the Internet of Things. In a fiercely competitive market, companies must transform their business models and embrace new approaches. This Companion provides a comprehensive management overview of strategic digital outsourcing and is an invaluable resource for researchers and advanced students in business and strategic information management, as well as a timely resource for systems professionals.