Christopher John Books

When the Tripods Came

By Joe Burleson, John Christopher

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The City of Gold and Lead The Tripods

By John Christopher

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The White Mountains

By John Christopher

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The Tripods Collection The White Mountains The City of Gold and Lead The Pool of Fire When the Tripods Came

By John Christopher

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Beyond the Burning Lands

By John Christopher

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"In the beginning, many, many years ago, there were two tribes. Dom was a boy from the hunting tribe, and Va was a girl from the farming tribe. The two tribes fought, but that couldn't stop Dom and...

In the beginning

By Sam Youd

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New found land

By Sam Youd

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After being transported by the mysterious fireball to an alternate world, Simon and Brad face Indians, Vikings, and Aztecs in their attempts to reach California.

New found land

By Sam Youd

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After being transported by the mysterious fireball to an alternate world, Simon and Brad face Indians, Vikings, and Aztecs in their attempts to reach California.

Dragon Dance

By John Christopher

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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.