Peter Harmsen Books

Shanghai 1937

By George Backman, Peter Harmsen

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Shanghai 1937

By Harmsen Peter Journalist

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Nanjing 1937

By Harmsen Peter Journalist

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"The infamous Rape of Nanjing looms like a dark shadow over the history of Asia in the 20th century, and is among the most widely recognized chapters of World War II in China. By contrast, the stor...

Shanghai 1937 Stalingrad on the Yangtze

By Peter Harmsen

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Storm Clouds over the Pacific 1931 1941

By Peter Harmsen

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Japan Runs Wild 1942 1943

By Peter Harmsen

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Shanghai 1937

By Harmsen Peter Journalist

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War in the Pacific

By Peter Harmsen

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Japan Runs Wild 1942 1943

By Peter Harmsen

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Shanghai 1937

By Peter Harmsen

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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.