What if living longer in data makes us less sure who is living at all? This book offers a clear, humane guide to thinking through the promises and perils of digital immortality. It explains what mind uploading could mean in practice, how identity continuity might succeed or fail, and why neural preservation is only part of the story. You will learn how philosophers test the self, what neuroscientists can and cannot measure, and how designers should build safeguards for a digital afterlife that serves people rather than markets. Whether you lean spiritual or sceptical, it equips you to judge claims about consciousness upload without buying the hype. Along the way, it tackles transhumanism ethics, rights for continuers, and the real-world consequences for families, grief, and law. It is written for readers who want both rigour and compassion. By the end, you will have a practical framework for deciding where you stand on personal identity theory and the philosophy of self-and how to live well now, regardless of which future you choose.