This work investigates how the reign of Alfonso V of Aragon transformed the Kingdom of Naples into a centralized, modern state during the mid-fifteenth century. Alan Ryder, a noted historian of the Aragonese Mediterranean, utilizes extensive archival research to examine the administrative, military, and fiscal reforms implemented by Alfonso. The text argues that Alfonso's governance laid the essential groundwork for the political structures that would define the kingdom throughout the subsequent period of Spanish rule.

Historians and scholars of the Italian Renaissance frequently cite this work as a definitive study on the political mechanics of Alfonso's reign. Readers often note the academic density of the prose, which provides a rigorous examination of the institutional changes that shaped the early modern Mediterranean.