John Connolly Books

The Book of Lost Things

By John Connolly

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The Book of Lost Things Illustrated Edition

By John Connolly

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The Book of Lost Things Illustrated Edition

By John Connolly

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The Unquiet: A Charlie Parker Thriller: 6

By John Connolly

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The Unquiet: A Charlie Parker Thriller: 6

By John Connolly

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Daniel Clay, a once-respected psychiatrist, is missing. His daughter insists that he killed himself after allegations surfaced that he had betrayed his patients to foul and evil men. But when a kil...

The Reapers: A Charlie Parker Thriller: 7

By John Connolly

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The Lovers: A Charlie Parker Thriller: 8

By John Connolly

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Charlie Parker is a lost soul. Deprived of his private investigator's license and under scrutiny by the police, Parker takes a job in a Portland bar. But he uses his enforced retirement to begin a...

The Lovers: A Charlie Parker Thriller: 8

By John Connolly

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The Lovers: A Charlie Parker Thriller: 8

By John Connolly

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Nocturnes

By John Connolly

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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.