Theodore Roszak Books

Person Planet

By Theodore Roszak

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Dreamwatcher

By Theodore Roszak

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Voice of the Earth

By Theodore Roszak

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Longevity rules

By Stuart Greenbaum

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"A compendium of 34 extraordinary and diverse essays, bookended by an introductory reality check by the Boomer Project and an inspiring array of successful programs compiled by Harry (Rick) Moody,...

Bugs

By Theodore Roszak

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Flicker

By Roszak Theodore

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The Voice of the Earth

By Theodore Roszak, Roszak Theodore

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The voice of the Earth

By Roszak Theodore

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The Memoirs of Elizabeth Frankenstein

By Theodore Roszak, Roszak Theodore

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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.