Augustine Casiday Books

Tradition and Theology in St John Cassian

By A. M. C. Casiday

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Orthodox Christian World

By Augustine Casiday

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Encyclopedia of Orthodox Christianity

By Marcus Plested, Augustine Casiday

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Cambridge History of Christianity

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Reconstructing The Theology Of Evagrius Ponticus Beyond Heresy

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"Evagrius Ponticus is regarded by many scholars as the architect of the eastern heresy Origenism, as his theology corresponded to the debates that erupted in 399 and episodically thereafter, culmin...

Grace for Grace

By Brian J. Matz, Alexander Y. Hwang, Augustine Casiday

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Remember the Days of Old

By Augustine Casiday

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Reconstructing the Theology of Evagrius Ponticus

By Augustine Casiday

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Cambridge History of Christianity

By Frederick W. Norris, Augustine Casiday

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Evagrius Ponticus

By Augustine Casiday

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How to Convert ISBN-10 to ISBN-13 (and Vice Versa): A Complete Guide

If you’re in the world of books—whether as a publisher, librarian, bookseller, or avid collector—you’ve likely come across the terms ISBN-10 and ISBN-13. Understanding these formats and knowing how to convert between them is essential for maintaining consistency and compatibility in book records. In this post, we’ll cover everything you need to know about ISBN conversions, step by step.

What is an EAN and How Does it Relate to an ISBN?

If you’ve ever purchased a product online or in a store, you’ve likely come across a barcode. Behind these barcodes lies a standardized system that makes modern commerce possible. Two key codes often encountered are the EAN (European Article Number) and ISBN (International Standard Book Number). But what are they, how are they connected, and why are they so crucial? Let’s explore.