This book, Samgugyusa, is the best example of classical literature in Korea and Il Yeon was a person who laid the foundation history and his book enabled us to understand our own history, independently from China. Exploring familiar and interesting stories in the book, you get a glimpse of the rise and fall of our ancient countries through various national myths, folktales, folk religions, Buddha’s teaching, and so on. This is why we should read this book.