! This book introduction is translated by machine translators and may contain mistranslations. For exact information, please refer to the publisher’s official introduction. ! All the books we sell have a small mark or label on either the top or bottom edge of the book, placed by us or the publisher/distributor. This is a common practice in Korea to verify authenticity and track the distribution route of the books. ! Please note that the cover design of the books may change without prior notice.
