This book investigates the mechanisms of language variation and change by analyzing the structural evolution of relative clauses within the Portuguese language. The author, Adriana Cardoso, utilizes a generative syntax framework to examine how specific linguistic phenomena shift over time. By comparing Portuguese data with cross-linguistic evidence, the text evaluates competing theoretical models to explain syntactic development.

Experts recognize this work as a specialized contribution to the study of Romance language syntax and historical change. Readers frequently note the academic density of the prose, which is intended for researchers and advanced students of linguistics.