This work investigates the evolution of English law during the reign of Edward I, specifically focusing on the legislative output that shaped the medieval legal system. Theodore F. T. Plucknett, a distinguished legal historian, utilizes primary source documents and parliamentary records to analyze the transition from feudal custom to statutory law. The book argues that Edward I's reign represents a critical juncture in the professionalization of the judiciary and the formalization of legal procedures in England.

Legal historians regard this text as a foundational study of the constitutional and legal developments under the Plantagenet monarchy. Scholars frequently note the academic density of the prose and the author's meticulous attention to the technical nuances of medieval jurisprudence.