Dr. John D. Grainger Books

Seleukos Nikator: Constructing a Hellenistic Kingdom

By Grainger John D., Dr. John D. Grainger

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The Rise Of The Seleukid Empire (323-223 BC): Seleukos I To Seleukos III

By JOHN D. GRAINGER, Grainger, John D., Dr. John D. Grainger

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The Seleukid Kingdom Was The Largest State In The World For A Century And More Between Alexander's Death And The Rise Of Rome. It Was Ruled For All That Time By A Succession Of Able Kings, But Brok...

Cromwell Against the Scots

By Grainger John D.

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Syrian Influences in the Roman Empire to Ad 300

By John D. Grainger

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Kings And Kingship In The Hellenistic World 350 - 30 BC

By John D. Grainger, Dr. John D. Grainger

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Between c.350 BC and 30 BC the Mediterranean world was one in which kings ruled. The exceptions were the Greek cities and Roman Italy. But for most of that period neither of these republican areas...

Roman Conquests

By John D. Grainger

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Roman Imperial Succession

By John D. Grainger

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Roman Imperial Succession

By John D. Grainger

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Roman Imperial Succession

By John D. Grainger

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Roman Imperial Succession

By John D. Grainger

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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.