The articles in the present volume offer an updated view of the breadth of theoretical and empirical research being carried on in the different subgroups of the Afroasiatic phylum. They are written by leading specialists and are representative of widely different perspectives and interests, from the analysis of data from scarcely known varieties to the reappraisal of old debates (such as the value of the Classical Arabic verbal forms). Reflecting a great diversity of language structures and functions, the articles are grouped into three broad areas: the phylum as such in its classificatory and typological aspects; the analysis of the intricate morphology of Afroasiatic and its developments; and the syntax of Afroasiatic in its widest sense, from the clause to the sentence and beyond. They witness how Afroasiatic, with its unsurpassed historical depth and immense geographical breadth, keeps representing a constant source of fascinating data and implications for linguistic theory.