How can the relationships of Christianity with other religions be shaped? Are boundaries necessary, or is the search for a common foundation more important? Do not all ultimately believe in the same God, and do not all refer to the same truth? Engaging with different religious traditions and interreligious dialogue is of great importance in a globalized world where hardly anyone can avoid encountering the overwhelming religious diversity that exists. This handbook gathers classical texts and contemporary contributions from Christianity, as well as Judaism, Islam, Hinduism, and Buddhism. It also includes official statements from the Catholic and Protestant churches. The book provides foundational guidance for navigating religious plurality for use in communities and academic settings.