Gerald O'Collins, S.J., A.C., is Professor Emeritus of Gregorian University, Rome.

Mario Farrugia, S.J., is Professor of Systematic Theology at Gregorian University, Rome.

"[This book] remains the text for understanding Catholicism. The authors cover two millennia of Catholic history, tradition, understandings, and doctrine, and also provide important information on the Church's structure and mission. This accessible book is designed for both Catholics and non-Catholics. Education remains the top priority. By sharing the rich history of Catholicism, the authors hope that all groups will better understand the Church's current actions and positions. Catholicism should be the number one resource on Catholicism for all readers, and this second edition is a must-have... Essential." --CHOICE

"This book is a must-read for all scholars and students of religious studies and also for all those who want to know about Catholic Christianity. After reading the book one understands why this text is considered authoritative on Catholicism; it is both gripping and informative." -- Swami Narasimhananda, Reading Religion