This outstanding volume offers the first comprehensive collection of optimality-theoretic studies in Spanish phonology. Bringing together most of the best-known researchers in the field, it presents a state-of-the-art overview of research in Spanish phonology within the non-derivational framework of optimality theory. The book is structured around six major areas of phonological research: phonetics–phonology interface, segmental phonology, syllable structure and stress, morphophonology, language variation and change, and language acquisition, including general as well as more specialized articles. The reader is guided through the volume with the help of the introduction and a detailed index. The book will serve as core reading for advanced graduate-level phonology courses and seminars in Spanish linguistics, and in general linguistics phonology courses. It will also constitute an essential reference for researchers in phonology, phonological theory, and Spanish, and related areas, such as language acquisition, bilingualism, education, and speech and hearing science.