This is a book made by Queen Insu, King Seongjong’s mother, and Queen Jeonghyeon, one of King Seongjong’s wives, to pray for the peace of the dead King Seongjong (r. 1469-1494). Regarded as a valuable material for those studying the development of Korean, it includes content about Buddhist ceremonies in Hangeul (Korean alphabet). The printed letters look neat and exquisite.