Book review: Thomas Pellard. Koguryo, the Language of Japan’s Continental Relatives: An Introduction to the Historical-Comparative Study of the Japanese-Koguryoic Languages with a Preliminary Description of Archaic Northeastern Middle Chinese. By Christopher I.Beckwith. Brill’s Japanese Studies Library, vol. 21. Leiden: Brill, 2004. 274 pages. // Korean Studies. - 2005. - 29: 167-170 p.