Robert K. Wittman Books

The Devil's Diary: Alfred Rosenberg and the Stolen Secrets of the Third Reich

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"This exploration of the private wartime diary of Alfred Rosenberg--Hitler's 'chief philosopher' and architect of Nazi ideology--interweaves the story of its recent discovery with the revelation of...

The Devil's Diary

By Robert K. Wittman, David Kinney

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The Devil's Diary: Alfred Rosenberg and the Stolen Secrets of the Third Reich

By Robert K. Wittman

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Infiltrado

By Robert K. Wittman, John Shiffman

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Devil s Diary

By Robert K. Wittman, David Kinney

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Devil s Diary

By Robert K. Wittman, David Kinney

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Devil s Diary

By Robert K. Wittman, David Kinney

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Devil s Diary

By Robert K. Wittman, David Kinney

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Devil s Diary

By Robert K. Wittman, David Kinney

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Priceless

By Robert K. Wittman

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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.