D. Vincent Twomey Books

Pope Benedict XVI

By D. Vincent Twomey

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The great persecution

By Ireland Patristic Conference 5th 2003 Maynooth

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Moral theology after Humanae Vitae

By Vincent Twomey

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"The author discusses some of the major developments in fundamental moral theology which were sparked off by the publication of the hugely controversial encyclical, Humanae Vitae (1968), as well as...

The End of Irish Catholicism

By Vincent Twomey, D. VINCENT TWOMEY

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Dynamics of the Liturgy

By D. Vincent Twomey

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Eschatological Person

By D. Vincent Twomey, Andrew T. J. Kaethler

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Eschatological Person

By D. Vincent Twomey, Andrew T. J. Kaethler

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Eschatological Person

By D. Vincent Twomey, Andrew T. J. Kaethler

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Benedict XVI and Beauty in Sacred Art and Architecture

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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.