Callum Macdonald Books

The Lost Battle : Crete 1941

By Callum Macdonald, C. A MacDonald, C.A. MacDonald

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Kill The SS Obergrupp

By Callum Macdonald, C. A. MacDonald

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Killing Of SS Obergruppenfuhrer Reinhard Heydrich

By Callum Macdonald, C. A MacDonald, Call Macdonald

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Based on previously untouched archive material and interviews with surviving members of SOE and Czech military intelligence, this is an account of the motives for killing Heydrich, the course of th...

The Last Battle: Crete 1941

By Callum Macdonald, C. A MacDonald, Callum Alexander MacDonald

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The German invasion of Crete in 1941 and the ensuing struggle between German and British forces was one of the most dramatic and exciting battles of the Second World War. Now, using previously top-...

The Lost Battle : Crete 1941

By Callum Macdonald, C. A. MacDonald, Callum Alexander MacDonald

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The Killing Of Ss Obergrupenfuehrer

By Callum Macdonald

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The Killing Of Reinhard Heydrich

By Callum Macdonald, C. A MacDonald, Callum A. Macdonald

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The extraordinary account of one of the most daring World War II missions, as told in the movie Anthropoid If anyone warranted assassination during World War II, the man to know was Reinhard Heydri...

The Assassination Of Reinhard Heydrich

By Callum Macdonald, C. A. MacDonald, Callum MacDonald, C. A. MacDonald

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On 4 June 1942 one of the most powerful figures of the Nazi regime died in agony from wounds sustained during an assassination attempt in Prague. This is the story of the killing of Reinhard Heydri...

The Killing Of Reinhard Heydrich

By Callum Macdonald, Callum A. Macdonald, C. A. MacDonald

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Úder Z Londýna

By Callum Macdonald, Katerina Brezinová

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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.