The Business of Quantum Technologies: From Theory to Innovation Strategy explores the economic, managerial, and organisational implications of emerging quantum technologies. It provides conceptual frameworks for understanding how advances in quantum science and engineering may translate into new business opportunities, industrial transformations, and innovation strategies. Rather than approaching quantum technologies solely from a technical perspective, the book examines their potential influence on markets, business ecosystems, organisational structures, and long-term competitiveness. The book introduces the three major domains of quantum technologies: quantum computing, quantum communications, and quantum sensing, imaging, and timing. It discusses their underlying principles and potential applications, highlighting their implications for areas such as security, manufacturing, energy, and transportation. The authors also address broader issues, including sustainability, ethics, and the changing relationship between technological development and economic activity. A central theme of the book is the emergence of the quantum industry and the strategic considerations involved in adopting and commercialising quantum technologies. Topics such as business model innovation, technology management, university–industry collaboration, policy initiatives, and innovation ecosystems are discussed throughout the book. The work is particularly relevant to business leaders, policymakers, researchers, and entrepreneurs seeking to understand the strategic and organisational dimensions of the developing quantum economy.