Moon Calvin K.S Moon is currently working as a research director at the Asia Association of English Education, Incorporated and has been developing Solutions and Contents for Efficient Way of studying English Under EFL(English as a Foreign Language)environment. So far, He and his team has developed more than 1,000 e-book contents for learning English and he himself has written and translated many English textbooks including
1. Overview of Changgyeonggung Palace
2. Gates of Changgyeonggung Palace
3. Royal buildings of Changgyeonggung Palace