Grammar in Use Intermediate Student's Book with Answers : Self-study Reference and Practice for Students of American English (Paperback, 4 Revised edition) - Cambridge In Use 35
The Story of the World Vol. 2: History for the Classical Child: The Middle Ages: From the Fall of Rome to the Rise of the Renaissance (Paperback, Revised Edition) - The Story of the World 18
The Story of the World, Vol. 3 : History for the Classical Child: Early Modern Times (Paperback, Revised Edition) - 『교양있는 우리 아이를 위한 세계 역사 이야기 3』원서 - The Story of the World 20
