Denis R. McNamara Books

Heavenly City

By Denis R. Mcnamara

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Comprendre l art des eglises

By Denis R Mc Namara

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Jak czytac koscioly

By Denis R. McNamara

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Como leer iglesias

By Juan Luis Gonzalez Garcia, Denis R. McNamara

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Small enough to fit in a pocket yet serious enough to provide real answers, this primer is a must-have for architecture and history buffs, tourists, and churchgoers interested in decoding the style...

How to Read Churches

By Denis R. McNamara

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Catholic Church Architecture and the Spirit of the Liturgy

By Denis R. McNamara

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This unique book delves into the deep meanings of liturgical art and architecture, and by association, the Sacred Liturgy itself. It is meant to help pastors, architects, artists, members of buildi...

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.