Roy Barkley Books

First Saturday Devotions To Mary: A Handbook

By Roy Barkley

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The Portable Handbook Of Texas

By Roy Barkley, Texas State Historical Association, Roy R. Barkley, Mark F. Odintz

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Presents A Historical Survey Of Texas From Prehistoric Times To 2001, Followed By Alphabetically Arranged Entries That Provide Information On Various Aspects Of The History And Culture Of The State...

The Handbook Of Texas Music

By Roy Barkley, George B. Ward, Dave Oliphant, Douglas E. Barnett, Roy R. Barkley, Gary Hartman, Cathy Brigham, Casey Monahan

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Editorial Board, Roy Barkley ... [et Al.]. Includes Bibliographical References And Indexes.

The Handbook Of Texas Music

By Roy Barkley, George B. Ward, Dave Oliphant, Douglas E. Barnett, Roy R. Barkley, Gary Hartman, Cathy Brigham, Casey Monahan

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Editorial Board, Roy Barkley ... [et Al.]. Includes Bibliographical References And Indexes.

Catholic Ministry To The Addicted

By Roy, Raimondo Spiazzi, Benedict, Barkley, Roy Barkley, Hans Urs Von Balthasar

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144 p. ; 21 cm Includes bibliographical references (p. 131-144)

The Catholic Alcoholic

By Roy Barkley

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Journey Of Faith: Catholic Marriage Preparation

By Roy Barkley

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viii, 111 p. ; 22 cm Includes bibliographical references (p. 109-111)

The Mysteries Of The Rosary: Mirror Of Scripture And Gateway To Prayer

By Roy Barkley

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$Gabriel Prayer Book : Prayers For Mothers Of Unborn Babies \:Cby Deaco...$

Gabriel Prayer Book : Prayers For Mothers Of Unborn Babies \:Cby Deaco...

By Roy Barkley

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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.