John Katzenbach Books

The Madman's Tale

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It’s been twenty years since Western State Hospital was closed down and the last of its inmates reintegrated into society. Francis Petrel was barely out of his teens when his family committed him t...

The Wrong Man: A Novel

By John Katzenbach

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The Wrong Man

By John Katzenbach

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Scott Freeman is a man of reason–a college professor grounded in the rational and practical. But he becomes uneasy after finding an anonymous love letter hidden in his daughter’s room: “No one coul...

State of Mind

By John Katzenbach

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State of Mind

By John Katzenbach

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Day Of Reckoning

By John Katzenbach

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Day Of Reckoning

By John Katzenbach

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Just Cause

By John Katzenbach

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The Analyst

By John Katzenbach

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The madman s tale

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.