Jan Guillou Books

Birth of the Kingdom: 3 3

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Arn de Gotha has become one of the most feared warriors of the Knights Templar fighting to liberate Palestine with the Crusaders. At the great battle for Jerusalem, a mammoth and bloody struggle wh...

The Road to Jerusalem: Book One of the Crusades Trilogy

By Jan Guillou

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Birth of the Kingdom: Book Three of the Crusades Trilogy

By Jan Guillou

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One of the most feared warriors of the Knights Templar, Arn de Gotha, after being exiled for twenty years, returns home to Sweden only to find his beloved homeland torn apart by warring clans and e...

Enemy's enemy

By Jan Guillou

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Enemy s Enemy

By Jan Guillou

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Der demokratische Terrorist

By Jan Guillou

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Enemy's enemy

By Jan Guillou

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The road to Jerusalem

By Jan Guillou

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The Templar knight

By Jan Guillou

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He was Master of the great Gaza stronghold and lands. He was the champion of the Knights Templar. But Arn de Gothia has also become the friend of the Crusaders' most feared enemy, the great Saladin...

Birth of the kingdom

By Jan Guillou

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Arn de Gothia has become one of the most feared warriors of the Knights Templar, fighting to liberate Palestine with the Crusaders. At the great battle for Jerusalem, Arn is saved from certain deat...

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.