David Walker Undifferentiated Books

The adorable bears are excited to dress up for Halloween — but are there enough costumes for everyone?Big Brown Bear and the four little bears can’t wait to dress up for Halloween. Ever...

Bears at the Beach

By Shirley Parenteau Illustrated By David Walker

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Who wants to build a castle? The adorable bears are back—and at the shore having buckets of fun (with just a few spills along the way).Here’s a wave-washed beachwhere a castle can stand...

Peep and Ducky It's Snowing!

By David Martin Illustrated By David Walker

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“Young children in wintry climes will certainly see their own snow-day play reflected here.” —Kirkus Reviews“It’s snowing!” yells Peep.“It’s snowing!...

Shirtmaker

By David Walker Undifferentiated

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Jiu Jitsu for Beginners

By David Walker Undifferentiated

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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.