Rupert Butler Books

The Black Angels

By Rupert Butler

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An illustrated history of the Gestapo

By Rupert Butler

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For twelve years, Hitler's secret state police--the Geheime Staats Polizei, better known as the Gestapo--spread a reign of fear and terror over Europe. Spoken of in whispers, a law unto themselves,...

Hand of steel

By Rupert Butler

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SS Leibstandarte

By Rupert Butler

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Hitler's jackals

By Rupert Butler

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An illustrated history of the Gestapo

By Rupert Butler

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Great battles of World War II

By Mann Chris Historian, Rupert Butler

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Great battles of World War II

By Mann Chris Historian, Rupert Butler

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"You may be a military history buff yourself or you may know someone who considers themselves an armchair general , or even have a family member who is a veteran of World War II - if any of those d...

Stalin s secret police

By Rupert Butler

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100 batallas

By Rupert Butler, Michael Spilling

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Surveys the one hundred most decisive battles in world history from the battle of Kadesh in 1294 BCE to the Georgian invasion of South Ossetia, 2008.

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.