Throughout the past five decades, research and development in the world of nuclear fusion has been led by large publicly funded national laboratories. Currently, fusion energy technology development is being embraced by small, fast-moving start-up companies. This edited book provides an overview of the commercialisation of fusion energy technology, stressing the role to be played by small businesses and the ongoing importance of public sector efforts. All chapters were peer-reviewed by experts before publication to ensure the reliability of the scientific content. The editors are of the opinion that “there is a need for a good overview of a complex phenomenon that has the potential to transform fusion energy research after decades of leadership by governmental and inter-governmental efforts.” The book addresses not only the science and technology of fusion commercialisation, but also the associated innovation management. The first section of the book provides an introduction to private fusion and explains that the marketed product will not necessarily be electricity. The policy context of a global need for decarbonisation is introduced and compared to the timescales of fusion commercialisation. The second section introduces some of the leading private sector initiatives in fusion from around the world. Then, the third section outlines the public sector's ongoing efforts toward commercialisation. And finally, the fourth section discusses the challenges and future opportunities of private fusion.Key Features This book tells a story about a technology in transition Provides an overview of the commercialisation of fusion energy technology, stressing the emerging role being played by small businesses Explores not only the science and technology behind fusion commercialisation but also innovation management Suitable for both academic and non-academic researchers and scholars