Gordon Jack Books

Social Work with Children

By Gordon Jack, Helen Donnellan

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The missing side of the triangle

By GORDON JACK

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The Survival Guide for Newly Qualified Social Workers Second Edition

By Gordon Jack, Helen Donnellan

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Nadelstiche fur die Seele.

By Windy Dryden, Jack Gordon

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Because of his string of pranks, Lawrence Barry is one step away from reform school unless he agrees to mentor Spencer Knudsen, a Norwegian exchange student with Spock-like intelligence but no soci...

Boomerang Effect

By Gordon Jack

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Your own worst enemy

By Gordon Jack

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Follows three candidates running for Lincoln High's student body president with three different platforms and who will stop at nothing to be elected.

Your Own Worst Enemy

By Gordon Jack

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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.