Barbara Harken Books

Degree of guilt

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"After a year of teaching rotten students and dealing with an even more rotten boyfriend in Chicago, Maggie Witkowski wants to enjoy her inheritance--her grandparents' lakeside cabin in northern Wi...

The 86th Degree

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Degree of Normal

By Barbara Harken, Cleone Reed

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Degree of Guilt

By Barbara Harken

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Degree of Guilt

By Barbara Harken

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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.