Catharine O Neill Books

Siblings Annie and Simon may be years apart, but the endearingly offbeat duo never fail to highlight the best — and silliest — parts of being brother and sister.Little sister Annie and...

Annie and Simon

By Catharine O Neill

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Annie and Simon: The Sneeze and Other Stories

By Catharine O Neill Illustrated By Catharine O Neill

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Little sister, big big brother, and (mostly) good friends — Annie and Simon are back in a second wry and warmhearted early chapter book.Annie loves to draw and fill sheets of paper with the t...

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...

DK Share a Story

By Sam McBratney, Catharine O Neill, Catherine 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.