John Connolly Books

Hell's bells

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Samuel Johnson, with a little help from his dashshund Boswell and a very unlucky demon named Nurd, has sent the demons back to Hell. But the diabolical Mrs Abernathy is not one to take defeat lying...

Hell s Bells Samuel Johnson vs. the Devil Round II

By John Connolly

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Hell s Bells

By John Connolly

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Bad Men Ssa

By John Connolly

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Black Angel Special Sales

By John Connolly

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A Song of Shadows A Charlie Parker Thriller 13

By John Connolly

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A Time of Torment A Charlie Parker Thriller 14. The Number One bestseller

By John Connolly

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A Time of Torment A Charlie Parker Thriller 14. The Number One bestseller

By I. F. Stone

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The Creeps A Samuel Johnson Adventure 3

By John Connolly

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The wolf in winter

By John Connolly

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Een geheimzinnige godheid in een dorpje in Maine eist de levens van jonge meisjes.

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.