David J. Symons Books

Costume of Ancient Rome Costume Reference Costume Reference

By David J. Symons, David Symons, Jack Cassin Scott, Jac Cassin Scott

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Costume of ancient Rome

By David Symons

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Outlines the geography and history of ancient Rome and describes, in text and illustrations, the materials and methods used to make clothing and the typical styles of the era.

The Music of Margaret Sutherland MUSIC

By David Symons

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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.