John Connolly Books

The gates

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Young Samuel Johnson witnesses strange goings-on at 666 Crowley Road. The Abernathys don't mean any harm by their flirtation with the underworld, but when they unknowingly call forth Satan himself,...

Unquiet

By John Connolly

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The Book of Lost Things

By John Connolly

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The reapers

By John Connolly

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The Whisperers

By John Connolly

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Whisperers

By John Connolly

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The Reapers

By John Connolly

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The Whisperers: A Charlie Parker Thriller: 9

By John Connolly

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Every Dead Thing

By John Connolly

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Hell s bells

By John Connolly

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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...

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.