Markus Wolf Books

Man Without a Face: The Autobiography of Communism's Greatest Spymaster

By Wolf Markus, Markus Wolf With Anne McElvoy

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Politische Philosophie und Dekonstruktion Beitr age zur politischen Theorie im Anschluss an Jacques Derrida

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In eigenem Auftrag

By Wolf Markus

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Spionagechef im geheimen Krieg

By Wolf Markus

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Specification of abstract data types

By Jacques Loeckx

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Specification of Abstract Data Types provides an authoritative introduction to the mathematical foundations of algebraic program specification. Unlike most other publications on the subject, this...

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.