This book provides a detailed and up to date review of the framework of phases (Chomsky 2000 and subsequent work). It explores the interaction between the narrow syntactic computation and the external systems from a minimalist perspective. As has sometimes been noted, Phase Theory is the current way to study the cyclic nature of the system, and 'phases' are therefore the natural locality hallmark, being directly relevant for phenomena such as binding, agreement, movement, islands, reconstruction, or stress assignment.
This work discusses the different approaches to phases that have been proposed in the recent literature, arguing in favor of the thesis that the points of cyclic transfer are to be related to uninterpretable morphology (the Φ-features on the heads C and v*). This take on phases is adopted in order to investigate raising structures, binding, subjunctive dependents, and object shift (word order) in Romance languages, as well as the nature of islands.

This book offers a comprehensive overview of the syntactic variation of the dialects of Spanish. More precisely, it covers Spanish theoretical syntax that takes as its data source non-standard grammatical phenomena. 

Approaching the syntactic variation of Spanish dialects opens a door not only to the intricacies of the language, but also to a set of challenges of linguistic theory itself, including language variation, language contact, bilingualism, and diglossia. The volume is divided into two main sections, the first focusing on Iberian Spanish and the second on Latin American Spanish. Chapters cover a wide range of syntactic constructions and phenomena, such as clitics, agreement, subordination, differential object marking, expletives, predication, doubling, word order, and subjects. 

This volume constitutes a milestone in the study of syntactic variation, setting the stage for future work not only in vernacular Spanish, but all languages.