Tony Gregory Books

The pocket encyclopaedia of modern roses

By Gregory Tony.

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Illustrated History of the World

By Tony Gregory

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The Dark Ages

By Tony Gregory

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Explores the history of the world, from the fall of Rome to the rise of Islam, discussing such areas as Europe, the Mediterranean, the Far East, and the Americas.

Television Inside Story

By Tim Byrne, Tony Gregory

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Romano British Farmstead at Weeting Norfolk

By D. Gurney, T. Gregory

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Roman Burials in Norfolk

By Tony Gregory, Field Archaeology Division Staff Norfolk Museums Service, Scole Archaeological Committee Staff, David Gurney, Mary Harman

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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.