Stephan Ahrens Books

Aussenseiter und Agent

By Stephan Ahrens

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Entwicklung und Perspektiven der Psychosomatik in der Bundesrepublik Deutschland

By Stephan Ahrens

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Lehrbuch der Psychotherapie und Psychosomatischen Medizin.

By Stephan Ahrens, Wolfgang Schneider

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Entwicklung und Perspektiven der Psychosomatik in der Bundesrepublik Deutschland

By Stephan Ahrens

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Oper und Film

By Stephan Ahrens, Arne Stollberg, Stefan Willer, Jorg Konigsdorf

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"Seit seinen Anfängen steht der Kinofilm in einem produktiven Konkurrenzverhältniszur Oper. Bereits Giacomo Puccini und Richard Strauss reagierten künstlerisch auf das neue Massenmedium Kino, das s...

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.