It is unusual for a volume in the English Episcopal Acta series to cover the episcopate of a single bishop. However, Peter des Roches was one of the most important and controversial figures in the political history of 13th-century England. Volume IX contains a large number of administrative writs relating to his role at court. Additionally, the editor's introduction (supplemented by an appendix detailing the lives of more than 40 individuals) provides a rounded picture of the bishop's household and his contacts at court, shedding light on the influence of foreigners in the reigns of kings John and Henry III. Vincent's edition complements EEA VIII (Winchester 1070-1204) to form an invaluable primary source for one of the wealthiest and most important bishops in medieval England.