Fred Eugene Ray Jr. Books

Land Battles In 5th Century Bc Greece A History And Analysis Of 173 Engagements

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Greek and Macedonian Land Battles of the 4th Century B.C.

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"Drawing from ancient accounts, with suitable analogs, this work offers reconstructions of 187 of the 4th century's most significant land engagements, considering tactical patterns, evolving trends...

Hellenistic Land Battles 300 167 BCE

By Fred Eugene Ray

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Hoplites at War

By Paul M. Bardunias, Ray Fred Eugene Jr.

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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.