Dr. William O’Grady and Ph.D candidate Sejung Yang, along with Dr. Changyong Yang from Jeju National University, have seen the first volume of their Jejueo textbook published on July 5, 2017. The textbook, written for Korean speakers, is the first of its kind for Jejueo, recognized by several international groups (including UNESCO, Endangered Language Group, and Ethnologue) as an independent language rather than a dialect of Korean.
The textbook is the first in a projected four-volume series. You can purchase the textbook from Kyobo (website in Korean).
For more information, including small previews of the book, please read the Center for Korean Studies article.