New in paperback. Hardcover was published in 2019. In this volume, Ray Jackendoff and Jenny Audring embark on a major reconceptualization of linguistic theory as seen through the lens of morphology. Their approach, Relational Morphology, extends the Parallel Architecture developed by Jackendoff in Foundations of Language (2002), Simpler Syntax (2005), and Meaning and the Lexicon (2010). The framework integrates morphology into the overall architecture of language, enabling it to interact insightfully with phonology, syntax, semantics, and above all, the lexicon.