Book excerpt: The Routledge Handbook of Spanish Morphology presents a state-of-the-art, detailed and exhaustive overview of all aspects of Spanish morphology, paying equal attention to the empirical complexities of the morphological system and the theoretical issues that they raise. As such, this handbook is relevant both for those interested in the facts of Spanish morphology and those interested in general morphology that want to explore how the Spanish facts illuminate our understanding of human language and current theories of morphology. This volume is also unique in its extent and coverage. Written by an international team of leading experts in the field, it contains 42 chapters divided into four sections, covering all synchronic and diachronic aspects of Spanish morphology, including inflection; derivation; compounding and other processes of word formation; the interaction of morphology with other modules of grammar and the role of morphology in language acquisition, psycholinguistics and language teaching.