Dulcie Engel Books

A French Grammar Workbook

By George Evans, Dulcie M. Engel, Valerie Howells, Dulcie Engel, Engel, Dulcie, Evans, George, Howells, Valerie

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Developing on the success of Byrne and Churchill's Comprehensive French Grammar , revised and rewritten by Glanville Price, this book is designed to be used either as a companion volume to the r...

Teaching Grammar: Perspectives In Higher Education

By Dulcie M. Engel, Dulcie Engel, Florence Myles

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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.