Catharine O Neill Books

J. B. Wigglebottom and the Parade of Pets

By Catharine O Neill, Vivian Sathre

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Leprechaun Luck

By Erin Gobragh, Catharine O Neill

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Annie and Simon

By Catharine O Neill

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" In this second volume, little sister Annie finds she could use big brother Simon's help with her drawings of living things. She could also use some help appreciating Hazel, the non-purring dog. A...

Annie and Simon

By Catharine O Neill

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Cat Agent

By Alison Lurie, Edward Hower, Catharine O Neill

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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.