David Coory Books

Secrets of Fascinating Womanhood

By David Coory

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Stay Healthy by supplying what s missing in your diet

By David Coory

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Secretos De Mujer Fascinante

By Ray N Mihaere, David Coory, Carolina Seymour, Ann Yelayne

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Heal Your Eye Problems with Herbs, Minerals and Vitamins

By David Coory, Max Crarer

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This New Zealand book was written by Max Crarer of Wairoa while in his mid-70's. It tells the true story of how several years earlier he accidentally healed his Glaucoma (of 12 years standing) by t...

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.