Barbara Gregorich Books

Two bears, Waltur and Darwin, learn from their friend Matilda, a woodchuck, such lessons as "do not buy a pig in a poke" and "you can lead a horse to water, but you can't make him drink."

Waltur Paints Himself Into a Corner and Other Stories Waltur

By Barbara Gregorich

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Dnealian Home School Activities

By Barbara Gregorich

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Reading Baseball

By Barbara Gregorich, Christopher Jennison

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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.