Kostas Poulos Books

Amphivia terata

By Kostas Poulos

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I Am the God Hermes Tales from the Greek Myths

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Ena pagoto diarkei ligo

By Kostas Poulos

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"There are many machines. The ice cream machines are very nice, because they make delicious ice cream. But the most wonderful is the time machine..." (Description from Papadopoulos Publishing)

O Zografos Theofilos

By Kostas Poulos

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Once upon a time, in the greek island of Lesvos, lived a painter who used to paint on walls, in shops and houses. He painted so beautifully, that he soon became famous. This book is about the lif...

Ho Spyros Loues

By Kostas Poulos

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A flashback to the first Olympic Games of 1896, when Spyros Louis was named the first Greek Champion. It is about the great efforts of a nation to organise and retain the Olympic Games, during its...

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.