Tolbawi koji esŏ ŭi kyŏlchŏnTu-ch'an Yi, Cha-rin Kim, Yŏng-hwa Kim · First published 2014Open the Tome
Taedam han sŭpkyŏkchŏnSang-nyong Chang, Cha-rin Kim, Sang-ho Sŏ, Kim, Kwang-ho (Illustrator) · First published 2013Open the Tome
