John Caldwell Holt Books

How Children Learn

By John Caldwell Holt

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Teach Your Own

By John R. Holt, John Caldwell Holt

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Never too late

By John Caldwell Holt

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Teach Your Own

By John Caldwell Holt

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The classic work on teaching children at home, updated for today's new laws, new lifestyles, and a new generation of homeschooling parents. Today more than one and a half million children are being...

Escape from Childhood: The Needs and Rights of Children

By John Caldwell Holt

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Freedom and beyond.

By John Caldwell Holt

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What do I do Monday?

By John Caldwell Holt

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Teach Your Own

By Pat Farenga, Patrick Farenga, John Caldwell Holt, John Holt Undifferentiated

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A Life Worth Living

By Susannah Sheffer

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A Life Worth Living

By Susannah Sheffer, John Caldwell Holt

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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.