Douglas Clegg Books

Never land

By Douglas Clegg

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Dark of the Eye

By Douglas Clegg

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Breeder

By Douglas Clegg

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The hour before dark

By Douglas Clegg

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"When Nemo Raglan's father is murdered in one of the most vicious killings of recent years, Nemo must return to the New England island he thought he had escaped for good, Burnley Island and the sha...

The Halloween man

By Douglas Clegg

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The Infinite Leisure Horror

By Douglas Clegg

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Four Dark Nights

By Nancy Holder, Douglas Clegg, Bentley Little

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The hour before dark

By Douglas Clegg

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Four dark nights

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The most horrifying things take place at night, when the moon rises and darkness descends, when fear takes control adn terror grips the heart. The four original novellas in this collection each tak...

Nightmare House

By Douglas Clegg

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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.