The term Sino-Korean may refer to either the phonological system or vocabulary in Korean that is of Chinese origin. Along with the borrowing of Chinese characters, the Chinese readings of characters must also have been transmitted into Korean. A Study of Sino-Korean Phonology aims to contribute to the field of Sino-Korean phonology by re-examining the origin and layers of Sino-Korean pronunciations from a loanword phonology perspective. The central issues of this book include an ongoing discussion on the questions of which Chinese dialect Sino-Korean is based on and how the source form in Chinese was adapted into Korean. Last is an in-depth analysis of the layers of Sino-Korean.