Only 0.0012 Percent of people in the world develop lung cancer by the age of 36, and Paul Kalanithi is one of them. By the time you read this, he will no longer be alive. This book is the life experience of a genius doctor from Stanford University who is the winner of the "Highest Award of the American Association of Neurological Surgeons" and fights against cancer. The author Paul Kalanithi received a double degree in English Literature and Human Biology from Stanford University in the United States, a master's degree in the history and philosophy of science from the University of Cambridge in the United Kingdom, and a doctorate in medicine from Yale University in the United States with honors. He will soon be awarded the position of professor of surgery at Stanford School of Medicine and head his own research laboratory. In 2013, Paul, who was about to reach the peak of his life, was suddenly diagnosed with stage 4 lung cancer. Since then, he began to record the rest of his life as a doctor and a patient, reflecting on medical care and human nature. His articles have been published in media such as The New York Times and The Washington Post, and have attracted the attention of readers around the world. This book is beautifully written, sincere and touching. It contains deep thoughts on human nature, life and death, and medical treatment, which has moved countless readers around the world.