Henry Hemming Books

Churchill's Iceman: The True Story of Geoffrey Pyke: Genius, Fugitive, Spy

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In search of the English eccentric

By Henry Hemming

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In search of the English eccentric

By Henry Hemming

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Churchill's iceman

By Henry Hemming

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There is no reason why you should have heard of Geoffrey Pyke. After his suicide in 1948 he was described as one of the great geniuses of his time, to rank alongside Einstein, yet he remains today,...

Agent M

By Henry Hemming

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Agent M

By Henry Hemming

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Four Shots in the Night

By Henry Hemming

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Agents of Influence

By Henry Hemming

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The ingenious Mr. Pyke

By Henry Hemming

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Agent M

By Henry Hemming

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Maxwell Knight was perhaps the greatest spymaster in history, rumored to be the real-life inspiration for the James Bond character "M." He did more than anyone in his era to combat the rising threa...

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.