Page 1 to 4: Start Pages | Page 3: Philippe Rodriguez – Acknowledgments | Page 7 to 9: Philippe Rodriguez – Foreword | Page 11 to 31: Philippe Rodriguez – The metaverse, a world at the frontiers of reality | Page 33 to 55: Philippe Rodriguez – The metaverse, a cultural phenomenon | Page 57 to 83: Philippe Rodriguez – The metaverse, realm of immersive technologies | Page 85 to 113: Philippe Rodriguez – Blockchain and metaverse, an alliance of heart and reason | Page 115 to 142: Philippe Rodriguez – Towards a new economy and new uses | Page 143 to 163: Philippe Rodriguez – The metaverse, challenges and threats for humanity? | Page 165 to 187: Philippe Rodriguez – Conclusion: how to make the metaverse desirable? | Page 189 to 191: Notes | Page 192: Ending pages.