Robert J Duperre Books

Dawn Of Swords

By David Dalglish, Robert J Duperre

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Wrath of lions

By David Dalglish

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Blood of gods

By David Dalglish

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"Brothers and gods, Karak and Ashhur created Dezrel to be a paradise of ageless humans. But mortal hubris aroused one god's wrath, and forced the other to shield the young world's rebellious denize...

The Rift Volume 1

By Jesse David Young, Robert J Duperre

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The Rift Volume 2

By Jesse David Young, Robert J Duperre

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Boy in the Mirror

By Robert J Duperre

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Dead of Winter

By Robert Duperre, Jesse Young

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Fall

By Jesse David Young, Robert J. Duperre

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Gate

By Robert Duperre, Jesse Young

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Wrath of Lions

By David Dalglish, Robert J. Duperre

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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.