A nice touch is the glossary of terms used in this activity book.
국어문법의연구 Volume 2 of Kugŏ munpŏp ŭi tʻamgu, Ki-sim Nam,
The book is illustrated with charcoal drawings that feel dramatic.
국어문법의연구 Volume 1 of Kugŏ munpŏp ŭi tʻamgu, Ki-sim Nam
What stands out about this activity book is the sense of accomplishment it gives.