Roland Kley Books

Hayek's Social and Political Thought

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This book examines the work of one of the most controversial figures in recent social and political thought. Revered by some as the most important twentieth century theorist of the free society, Ha...

Der Friede unter den Demokratien

By Roland Kley

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Stimmabstinenz und direkte Demokratie

By Alois Riklin

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Der Friede unter den Demokratien

By Roland Kley

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Wachstum Geld und Geist

By Roland Kley

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Vertragstheorien der Gerechtigkeit

By Roland Kley

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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.