The first series of books, vol.1 Mystery, is written with Cipher Typeface Mysterysquare.
Typeface Mysterysquare is similar to the shape of the alphabet, but the beginning and end of strokes are unclear.
It contains stories about the mysterious phenomena of the world that even modern science and technology
couldn't reveal.
The second series of books, vol.2 Civilization, is written with Cipher Typeface Cuneiform.
Typeface Cuneiform is motivated by Cuneiform developed by ancient Sumerians.
It tells the stories of a historical event that took place in ancient civilizations.
The last series of books, vol.3 Commonsense, is written with Cipher Typeface Caesarcircular.
Typeface Caesarcircular is modified to match the Caesar code to the Korean alphabet.
It tells the stories about surprising knowledge in life that most people didn't know about.
