Chris Onstad Books

The great outdoor fight

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Since 2001, cult comic favorite Achewood has built a six-figure international following. Intelligent, hilarious, and adult (but not filthy), it's the strip you'll wish you'd discovered as an undera...

Errands into the Metropolis

By Jonathan Beecher Field, Chris Onstad

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Worst Song Played on Ugliest Guitar Achewood

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Achewood

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Achewood

By Chris Onstad

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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.