Dennis L. McKiernan Books

Once Upon a Summer Day

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The acclaimed author of the Mithgar novels, Dennis L. McKiernan enchanted fans and critics alike with the bestselling Once Upon a Winter’s Night. Now, this gifted author presents us with a de...

Dragondoom

By Dennis L. McKiernan

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A thousand years before the Winter War, Elgo, prince of the Vanadurin, killed the Dragon Sleeth and returned home with the fabulous wealth from the dead beast’s lair. But there was more in th...

Once Upon a Spring Morn

By Dennis L. McKiernan

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Once Upon a Spring Morn

By Dennis L. McKiernan

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Once Upon a Dreadful Time

By Dennis L. McKiernan

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Once Upon a Dreadful Time

By Dennis L. McKiernan

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Once Upon A Dreadful Time

By Dennis L. McKiernan

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National bestselling author of the Mithgar novels Dennis L. McKiernan delivers the exhilarating conclusion to his celebrated seasonal fairytale cycle, pitting the heroic couples of the Winter, Spri...

Die Legende vom Eisernen Turm 01. Die schwarze Flut.

By Dennis L. McKiernan

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Die Legende vom Eisernen Turm III Der schwarzeste Tag

By Dennis L. McKiernan

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Tales of Mithgar

By Dennis L. McKiernan

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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.