Based on the acclaimed two-volume Encyclopedia of Eastern Orthodox Christianity (Wiley Blackwell, 2011), and now  available for students, faculty, and clergy in a concise single-volume format

• An outstanding reference work providing an accessible English language account of the key historical, liturgical, doctrinal features of Eastern Orthodoxy, including the Non-Chalcedonian churches
• Explores the major traditions of Eastern Orthodoxy in detail, including the Armenian, Byzantine, Coptic, Ethiopic, Slavic, Romanian, Syriac churches
• Uniquely comprehensive, it is edited by one of the leading scholars in the field and provides authoritative articles by a team of leading international academics and Orthodox figures
• Spans the period from Late Antiquity to the present, encompassing subjects including history, theology, liturgy, monasticism, sacramentology, canon law, philosophy, folk culture, architecture, archaeology, martyrology, and hagiography
• Structured alphabetically and is topically cross-indexed, with entries ranging from 100 to 6,000 words

John Anthony McGuckin is Nielsen Professor of Early Church History at Union Theological Seminary, and Professor of Byzantine Christian Studies at Columbia University in New York. An Archpriest of the Romanian Orthodox Church (Archdiocese of the  Americas), Professor McGuckin is the author of  twenty five books on religious and historical themes, including The Orthodox Church (2008) and TheEncyclopedia of Eastern Orthodox Christianity (2-volume set, 2011), both published by Wiley Blackwell.

Professor McGuckin is assisted by two Associate Editors: Dr. Julia Konstantinovsky and Dr. Justin Lasser.