John Christopher Books

Prince-in-Waiting Luke returns from exile to Winchester, a city of a future England ruled by patterns from the past, and sets out on a journey through the Burning Lands, a volcanic wasteland inhabi...

The Prince in Waiting

By Sam Youd

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Thirteen-year-old Luke has no reason to suspect that anything will ever change in the primitive society of the future in which he lives.

The Sword of the Spirits: Sword of the Spirits Triology

By Sam Youd

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In the conclusion to the trilogy set in post-apocalyptic England, Luke returns a triumphant Prince from his expedition in the North, although he loses the three things he cares about most.

When the Tripods Came

By Sam Youd

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Wild Jack

By Sam Youd

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Clive Anderson is falsely accused of questioning the status quo and must escape from a twenty-third century "retraining school."

The Sword of the Spirits, Book 3

By Sam Youd

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Although he returns a triumphant Prince from his expedition in the North, Luke loses the three things he cares about most.

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.