"Booker is not content to question prevailing interpretations of a single set of events. Instead, he revises at least two centuries' worth of ways of knowing about them. Past Convictions will have paradigmatic significance for scholars seeking to know how various interpretations assumed their adamantine forms." (Thomas F. X. Noble, University of Notre Dame) "The book makes two impressive contributions to medieval history. First, Booker's careful analysis of a thousand-year-long historiographical tradition sounds a warning about the dangers of relying on reified traditions. Second, he cleverly recovers stifled voices from the ninth century, ones well worth remembering for their power in deposing an emperor. . . . An important read for anyone interested in historiography or Carolingian history." (Religious Studies Review)