Book excerpt: This volume offers a wide-range of case studies on variation and change in the sub-family of the Romance languages that includes French and Occitan: Gallo-Romance. Both standard and non-standard Gallo-Romance data can be of enormous value to studies of morphosyntactic variation and change, yet, as the volume demonstrates, non-standard and comparative Gallo-Romance data have often been lacking in both synchronic and diachronic studies. Following an introduction that sets out the conceptual background, the volume is divided into three parts whose chapters explore a variety of topics in the domains of sentence structure, the verb complex, and word structure. The empirical foundation of the volume is exceptionally rich, drawing on standard and non-standard data from French, Occitan, Francoprovençal, Picard, Wallon, and Norman. This diversity is also reflected in the theoretical and conceptual approaches adopted, which span traditional philology, sociolinguistics, formal morphological and syntactic theory, semantics, and discourse-pragmatics. The volume will thus be an indispensable tool for researchers and students in French and (Gallo-) Romance linguistics as well as for readers interested in grammatical theory, sociolinguistics, and historical linguistics.