John Christopher Books

In the divided England of the distant future, a recently-orphaned boy flees the sprawling area known as the Conurb for the serene world of the County where the people seem to live a simpler existence.

Lotus Caves

By Christoph

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Lotus Caves

By Sam Youd

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Rebelling against the monotonous life of the moon colony, two boys go beyond its boundaries and discover a series of caves ruled by a super-intelligent plant-like being.

The City of Gold and Lead

By Sam Youd, Christope

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Three boys set out on a secret mission to penetrate the City of the Tripods and learn more about these strange beings that rule the earth.

The City of Gold and Lead

By Sam Youd

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Three boys set out on a secret mission to penetrate the City of the Tripods and learn more about these strange beings that rule the earth.

The White Mountains

By Sam Youd

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The White Mountains

By Sam Youd

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Young Will Parker and his companions make a perilous journey toward an outpost of freedom where they hope to escape from the ruling Tripods, who capture mature human beings and make them docile, ob...

The Pool of Fire

By Sam Youd

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The Pool of Fire:

By Sam Youd

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Will and a small group of free people plan to destroy the three great cities of the Tripods before the arrival of a space ship destined to doom humanity.

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.