In this chapter, we learn that the book is called "The Immortality of the Human Genome," and that it was originally written by a doctor in a small town in the U.S. It was then revised by a peer-reviewed physician, who wrote some reflections on the book. The book now contains more medical knowledge than ever before. The narrator asks the doctor if there is anything in the book that is missing, and the doctor answers that there is, and that we should always update the book with the latest medical knowledge.