John Hennessy Books

Emily Jane Bronte and her music

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"The word 'music' is regularly used in literary analyses of the Brontë sisters' writings, particularly as regards its rhythmic structure or metre. it is known that music played an important and enj...

Architecture des ordinateurs

By Hennessy Patterson

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Arquitectura de Computadores

By John Hennessy, David Patterson

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Babyn Yar

By John Hennessy, Ostap Kin

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Babyn Yar

By John Hennessy, Ostap Kin

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Babyn Yar

By John Hennessy, Ostap Kin

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Coney Island Pilgrims

By John Hennessy

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At the End

By John Hennessy

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At the End

By John Hennessy

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Murderous Little Darlings

By John Hennessy

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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.