Rebecca Rist's research interests include the history of crusading, Jewish-Christian relations, the medieval Church, the papacy, religious belief, and political ideas in the Central Middle Ages. Her book The Papacy and Crusading in Europe, 1198-1245 (2009) examined the papacy's authorisation of crusades against heretics and political enemies in Europe during the first half of the thirteenth century. Her co-authored book The Cathars and the Albigensian Crusade: A Sourcebook with C. Leglu and C. Taylor (2014) brought together a rich and diverse range of medieval sources to examine key aspects of the growth of heresy and dissent in southern France in the twelfth and thirteenth centuries. Recent articles have explored aspects of papal policy with regard to crusading and the papacy's treatment of heretics and Jews in the High Middle Ages.