Glenn Herdling Books

Marvel Comics

By Glenn Herdling

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Spider Man

By Stan Lee, Richard Howell, JM DeMatteis, Glenn Herdling

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AVENGERS: THE GATHERING OMNIBUS

By Bob Harras

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One of the most shocking stories in Avengers history! When the Swordsman returns from the dead with the mysterious Magdalene by his side, a sprawling saga begins - and at its heart stands the shado...

Greek Mythology

By Glenn Herdling

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African Mythology

By Glenn Herdling

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African Mythology

By Glenn Herdling

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Piper Houdini Nightmare on Esopus Island

By Glenn Herdling

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Piper Houdini Nightmare on Esopus Island

By Glenn Herdling

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Piper Houdini Apprentice of Coney Island

By Glenn Herdling

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Deadpool Classic

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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.