Book excerpt: This volume makes important contributions to the growing body of descriptive and theoretical studies in Arabic linguistics. It focuses on the rich linguistic work being done on Arabic dialects. The papers on individual dialects draw attention to the micro-variation that exists, emphasize that they do not comprise a uniform group, and reveal the implications of dialectal variation for linguistic theory. The chapters are distributed over three parts: phonetics and phonology, syntax, and sociolinguistics. They address first and second language acquisition, historical linguistics, phonetics, aspects of negation, light verb constructions, raising verbs, and sociolinguistic variation. The book is indispensable reading for those working in dialect description, the analysis of Arabic and the Semitic languages, and linguistic theory more generally.