Karkkainen's Constructive Christian Theology for the Pluralistic World is a five-volume project that aims to develop a new approach to and method of doing Christian theology in a pluralistic world at the beginning of the third millennium. With the metaphor of hospitality serving as the framework for his discussion, Karkkainen engages Judaism, Islam, Buddhism, and Hinduism in sympathetic and critical mutual dialogue while remaining robustly Christian in his convictions. Never before has a fullscale doctrinal theology been attempted in such a wide and deep dialogical mode.