Book excerpt: A comprehensive, objective, scholarly and yet easy-to-read presentation of the differences, both historical, theological and liturgical between Roman Catholicism and Eastern Orthodoxy. The ideal complement (or even antidote) to such books as Upon this Rock; Jesus, Peter and the Keys; Two Paths; The Primacy of Peter; etc. Discusses Peter's Primacy and Succession, Ecclesiology, Infallibility, the Filioque, Celibacy, etc.