Jack Ludlow Books

Conquest

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In one generation the de Hautevilles have gone from obscurity to become the most potent warrior family in all of Christendom: depended on by the Pope, feared by Byzantium and respected by the Holy...

"1935. Cal Jardine, former British Officer and current soldier of fortune, breaks off his assignment smuggling Jews out of Nazi Germany when an old army colleague proposes a new commission. A myste...

A broken land

By Jack Ludlow

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"1936. Having returned from Abyssinia, soldier of fortune Cal Jardine is convinced by his abhorrence of fascism to travel to Barcelona and help facilitate rival athletic games to the Berlin Olympic...

Conquest

By Jack Ludlow

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In one generation the de Hautevilles have gone from obscurity to become the most potent warrior family in all of Christendom: depended on by the Pope, feared by Byzantium and respected by the Holy...

Conquest

By Jack Ludlow

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In twenty years the de Hauteville brothers have gone from penniless obscurity to become the most potent warrior family in Christendom: depended on by the Pope, feared by Byzantium and respected by...

Mercenaries

By Jack Ludlow

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Son of Blood Crusades Book 1

By Jack Ludlow

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Prince of legend

By Jack Ludlow

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"Bohemund takes a firm grip on the city despite the depleted crusading army thinned by death, disease and defection. Meanwhile, Tancred seeks his fortune in taking Jerusalem for the Christian faith...

A broken land

By Jack Ludlow

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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.