This book is a comprehensive study of the Night School during the Korean Empire Period. "Yahak," the Night School was a non-official institution for a crusade against illiteracy, and was also a place which created folk culture to meet new challenges through lectures, debates, plays, and concerts from the Korean empire period to the 1980s. This book analyzes background on the movement, foundation and management status, textbooks, functions, and operations since the mid-1890s until the Japanese annexation of Korea.