This book is a comprehensive compilation and organization of Dang Sajus, a form of divination passed down from the past. Dang Sajus were one of the popular methods of fortune-telling during the Joseon Dynasty. The original texts and reprints of Dang Sajus generally follow a similar framework, but upon closer inspection, there are subtle differences. This book selects and organizes these elements based on methods that are easier to interpret or records that are more suited to modern times.