John Verdon Books

Wolf Lake

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"The former NYPD star homicide detective is called upon to solve a baffling puzzle: Four people who live in different parts of the country and who seem to have little in common, report having had t...

White River burning

By John Verdon

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"It's always a pleasure to watch a keen mind absorbed in a difficult puzzle, which is how Dave Gurney distinguishes himself in John Verdon's tricky whodunits." -- The New York Times Tensions have b...

On Harrow Hill

By John Verdon

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658

By John Verdon

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N ouvre pas les yeux

By John Verdon

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N ouvre pas les yeux

By John Verdon

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658

By John Verdon

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Ancien alcoolique reconverti en gourou pour milliardaires dépressifs dans une clinique très privée, Mark Mellery reçoit un jour une lettre anonyme, lui demandant de se prêter à un petit jeu d'espri...

658

By John Verdon

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N ouvre pas les yeux

By N A

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Piter Pen dolzhen umeret

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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.