Jacques Duquennoy Books

The ghosts' trip to Loch Ness

By Jacques Duquennoy

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Four ghosts travel to Loch Ness in Scotland to see if they can spot the Loch Ness monster.

The Ghosts in the Cellar

By Jacques Duquennoy

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While playing cards in the great entrance hall of a castle, four friendly ghosts hear noises in the cellar that cause them to make a shocking discovery.

Operation ghost

By Jacques Duquennoy

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When Henry the ghost has some strange health problems, Dr. Ouch's operation fixes almost everything.

The Ghosts in the Cellar

By Jacques Duquennoy

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The Ghosts' Trip to Loch Ness

By Jacques Duquennoy

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The Ghost's Dinner

By Jacques Duquennoy, Golden Books

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Henry the Ghost hosts a dinner party at which the ghost guests turn the colors of the foods they eat.

The Ghosts in the Cellar

By Jacques Duquennoy

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Ghosts Trip to Loch Ness

By Jacques Duquennoy

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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.