Western Subanon Grammar is the first ever comprehensive description of Western Subanon, a highly endangered indigenous Austronesian minority language in the southern Philippines. Written by a native speaker and the result of intensive fieldwork, the book's 25 chapters cover the phonological, morpho-syntactic, and discourse properties of the language. Special attention is devoted to salient grammatical features of Western Subanon, including symmetrical voice, relative clauses, ellipsis, and scope. The volume also makes available numerous examples online through Kaipuleohone, the digital linguistic archive of the University of Hawaii.