Rabbi Soloveitchik advocated for strict limits on interfaith dialogue. Two recent books explore this issue in the thought of rabbis who, though influenced by the Rav, engaged in and sought halakhic mandates for such dialogue. Eliezer Finkelman reviews how Daniel Ross Goodman’s “Soloveitchik’s Children: Irving Greenberg, David Hartman, Jonathan Sacks, and the Future of Jewish Theology in America” (Alabama UP) shows how his subjects broke with the Rav, each in his own way. Alon Goshen-Gottstein’s “Covenant & World Religions” (Littman Library), challenges Sacks and Greenberg both for their justification and the limitations of their openness to other faiths.