Wanda Gag Books

Millions of Cats (Gift Edition)

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The original American classic with a refrain that millions of kids love to chant: Hundreds of cats, thousands of cats, millions and billions and trillions of cats.Once upon a time there was an old...

The original American classic with a refrain that millions of kids love to chant: Hundreds of cats, thousands of cats, millions and billions and trillions of cats. Wanda Gág's enchanting tale of th...

Nothing At All

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Night Is A Blanket

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The ABC Bunny

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Millions of cats.

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Gone is gone, or the story of a man who wanted to do housework

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Snow White and the seven dwarfs

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The funny thing.

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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.

Wanda Gag Books

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How to Convert ISBN-10 to ISBN-13 (and Vice Versa): A Complete Guide

What is an EAN and How Does it Relate to an ISBN?