Devorah Schoenfeld compares the two most important exegetical projects of the early twelfth century in Judaism and Christianity—the commentary of Rashi and the Glossa Ordinaria, both produced in northern France—with respect to the Binding of Isaac (Genesis 22). In this era following the First Crusade, Jewish-Christian relations had begun to deteriorate sharply, leading both commentaries to give this story a polemical treatment diverging from the earlier sources on which they rely. Paradoxically, the keener their polemic, the more the two exegetical positions mirror one another. For both, the story serves to display the greatness of Abraham, seen as embodying their own religious traditions, to hostile “others,” whom the Glossa explicitly names as Jews. For both, too, the near-sacrifice of Isaac prefigures a later sacrifice, whether the Temple sacrifices or the Crucifixion, with its continual reenactment in the Eucharist. Rashi, however, places greater emphasis on Isaac's willing sacrifice, which became a key paradigm for Jewish martyrs of the Crusades. Though Christians had long read Isaac as a type of Christ, this figuration perhaps made him less imitable. Schoenfeld ends her succinct and extremely useful study with a critical edition of the Glossa on Genesis 22 and an appendix on manuscript variants in Rashi.