Part 1: The essentials, Preface: why this book? 1 An introduction to the quantum world, 2 The background: why are we so enthusiastic about quantum technology? 3 The applications: what problems will we solve with quantum computers? 4 Timelines: when can we expect a useful quantum computer? 5 Four myths about quantum computing, Part 2: More about the applications, 6 Applications in chemistry and material science, 7 The impact on cybersecurity, 8 Applications of quantum networks, 9 Optimisation and AI: what are companies doing today? Part 3: The hardware and strategic actions, 10 Quantum hardware, 11 Error correction, 12 What steps should your organisation take?, Part 4: The final bits, 13 Further reading, 14 Overview of quantum computers available today, 15 Quantum Hype Bingo, 16 Acknowledgements, 17 Bibliography.