David DeJonge Books

The Prophetologion

By John Dykstra, Ed., David DeJonge, David Dykstra

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Anthologion

By John Dykstra, Ephrem Lash, David DeJonge

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The Anthologion Is An Eastern Orthodox Prayer Book That Uniquely Includes A Treasury Of Selections From The Riches Of Orthodox Prayer And Worship, Including The Book Of Hours (horologion), The Book...

Holy Psalter

By Orthodox Eastern Church, John Dykstra, Ephrem Lash, Christopher Morgan, David DeJonge

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Holy Psalter

By John Dykstra, John Chrysostom, Ephrem Lash, Christopher Morgan, David DeJonge

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Lectionary Bible Of The Orthodox Church

By John Dykstra, Ephrem Lash, David DeJonge

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Anthologion

By John Dykstra, Ephrem Lash, David DeJonge

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Beyond The Image : The History Of The Church Through Iconography

By David DeJonge, Katherine Khorey, Katherine Knorey

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A unique part of the Orthodox Christian tradition, sacred paintings called icons teach us the message of God, lay paths for our prayers, and point the way to our salvation. Painted by master iconog...

The Holy Apostle

By John Dykstra, David DeJonge

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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.