Margaret Duffy Books

Music in the Blood

By Margaret Duffy

Average: 0.00, 0 Ratings

A Murder of Crows

By Margaret Duffy

Average: 0.00, 0 Ratings

Blood Substitute

By Margaret Duffy

Average: 0.00, 0 Ratings

Dark side

By Margaret Duffy

Average: 0.00, 0 Ratings

When their friend, Detective Chief Inspector Carrick, becomes the prime suspect in a murder, Ingrid and Patrick take up the case to try to prove his innocence.

Dust to Dust A Gillard and Langley Mystery

By Margaret Duffy

Average: 0.00, 0 Ratings

Murders. com

By Margaret Duffy

Average: 0.00, 0 Ratings

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.