This work investigates the political career and influence of John Foster, the last Speaker of the Irish House of Commons, to understand the mechanics of power within the Anglo-Irish Ascendancy. A.P.W. Malcolmson, a noted historian of the Irish eighteenth century, utilizes extensive archival research and private correspondence to reconstruct Foster's role in the legislative and economic landscape of pre-Union Ireland. The book argues that Foster served as a pivotal figure whose actions reflected the broader tensions between the Irish Parliament and the British administration during a period of significant political upheaval.

Historians and scholars of Irish political history regard this text as a foundational resource for understanding the complexities of the Irish Parliament in the eighteenth century. Readers frequently note the academic density of the prose and the meticulous attention to administrative detail provided by the author.