Michael Gienger Books

Santa Fe, etc., etc., etc.

By Peter Pabisch

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Crystal and stone massage

By Michael Gienger

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"A full-color guide to crystal massage for healing, energy balance, and stress release in the physical, emotional, and energetic bodies [bullet] Illustrates full-body massage techniques with crysta...

Crystal Power Mythology and History

By Andreas Gurh, Jorg Nagler

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Aurum Manus

By Ricky Welch

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Twelve Essential Healing Crystals: Your First Aid Manual For Preventing And Treating Common Ailments From Allergies To Toothache

By Michael Gienger, Heider-Rauter, Barbara

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Take a moment to think hard about your relationships. The first one to come to mind may be with your partner or parents but there are many others in your life: relationships with your colleagues at...

Die Heilsteine Hausapotheke

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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.