Nicholas Sekunda Books

This volume was presented to John Ellis Jones on his 80th birthday, which fell on October 10th 2009, and consists of a collection of articles written by his friends, colleagues, pupils and admirers.

Hellenistic Infantry Reform in the 160 s Bc Studies on the History of Ancient and Medieval Art of Warfar

By Nick Sekunda

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Maratona 490 a. C. La prima invasione persiana della Grecia

By Nicholas Sekunda

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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.