Dennis William Hauck Books

The National Directory of Haunted Places

By Dennis William Hauck

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The Emerald Tablet

By Dennis William Hauck

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The Emerald Tablet—an ancient document that contains the essence of the alchemical teachings—has had an important influence on many Western spiritual and religious traditions. Ostensib...

Alchemy

By Dennis William Hauck

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The magic and mystery of the ancient craft revealed for a new, modern ageIt's completely understandable if you're in the dark about alchemy. It has been practiced around the world and linked to var...

Haunted Places

By Dennis William Hauck

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In almost every town in America there are places where strange things happen. The perfect companion to The International Directory of Haunted Places, this revised and updated edition of Haunted Pla...

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.