Ronald L. Bonewitz Books

Mrs Zigzag

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"When Betty Farmer married double agent Eddie Chapman, Agent Zigzag, she knew her life would never be ordinary. Yet even before her marriage to Eddie, her life involved incendiary bombs, serial kil...

Rock and Gem

By Ronald L. Bonewitz, Ra Bonewitz

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Egyptian Power Stamps

By Ronald L. Bonewitz

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Egyptian Power Stamps

By Ronald L. Bonewitz

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The Maya Deck

By Ronald L. Bonewitz

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Cast the Crystals Bookinabox

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El oraculo Maya

By Ronald L. Bonewitz

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Profecia Maya

By Ronald Bonewitz

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Wisdom of the Maya

By Ronald L. Bonewitz, Ra Bonewitz

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How to Use a Pendulum for Dowsing and Divination

By Ronald L. Bonewitz, Lilian Verner Bonds

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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.