John Katzenbach Books

Der Fotograf

By John Katzenbach

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Das Opfer

By John Katzenbach

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Ashley Freeman is a bright, beautiful young woman whose parents adore her. Unfortunately, Michael O'Connell, with whom she spends one liquor-fueled evening, also adores her, to the point where he w...

Das Ratsel

By John Katzenbach

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Das Opfer

By John Katzenbach

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Der Professor

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Der Wolf

By John Katzenbach

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Der Psychiater

By John Katzenbach

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DER TAETER KATZENBACH JOHN

By John Katzenbach

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Psiko Analist

By John Katzenbach

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Sizofren

By John Katzenbach

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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.