Gemma Correll Books

For Annie, lists are how she keeps her whole life in order. And there is a lot to keep track of! Do you love Anastasia Krupnik, Ramona Quimby, and the Penderwicks? Then you will love Annie!Annie's...

Knock Knock 100 Reasons to Panic About Getting Married

By Knock Knock

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100 Reasons to Panic about Being a Cat Lady

By Gemma Correll

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100 Reasons to Panic about Being a Grown Up

By Knock Knock Staff, Gemma Correll, Patricia Mumau

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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.