Chris OHalloran Books

Andrzej Sapkowski's The Witcher: The Edge of the World

By Original Story By Andrzej Sapkowski. Story Adaptation By Magdalena Salik. Illustrated By Tommaso Bennato. Colors By Chris O Halloran.

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A devilish tale full of shocking twists is presented in this graphic novel adaptation of Andrzej Sapkowski's original short story.Work is hard to come by for Geralt and with Dandelion, not a subjec...

Rain

By Joe Hill, Zoe Thorogood, David Booher, Chris OHalloran, Shawn Lee

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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.