This text focuses on the relationship between morphology and other modules of the grammar, especially phonology, syntax and semantics. Among the basic questions discussed is: how does morphology differ from other modules of the grammar, syntax in particular? semantics constrain formal variation in morphology? The evidence adduced is derived from a variety of languages. Theoretical, descriptive and historical linguists, morphologists, phonologists, and psycholinguists shoul find this book of value.