Olaf Jessen Books

Staying Home

By Jessica Le Bas, Olaf Jessen, Jesse O., O'Connor O.

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Imagine You Wake Up One Morning And Discover That A Pandemic Is Sweeping The Country And You Can't Leave Your House. You Have To Stay Home For More Than A Few Days - Possibly Weeks And Maybe Even M...

毛奇家族 : 一部战争史 = Die Moltkes : Biographie Einer Familie

By Olaf Jessen

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Moltke Preußens Feldherr

By Olaf Jessen

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Die Moltkes : Biographie Einer Familie

By Olaf Jessen

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"DIE GESCHICHTE EINER DER BERÜHMTESTEN DEUTSCHEN FAMILIEN ÜBERHAUPT." HANS-CHRISTOF KRAUS, HISTORISCHE ZEITSCHRIFTHelmuth von Moltke, der Sieger von Königgrätz und Sedan, wurde zur Ikone des Kaiser...

Die Moltkes Biographie Einer Familie

By Olaf Jessen

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Verdun 1916

By Olaf Jessen

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Verdun 1916 – längste Schlacht der Weltgeschichte, Sinnbild des totalen Krieges, Markstein für das 20.Jahrhundert. "So furchtbar kann nicht einmal die Hölle sein", entsetzte sich ein Augenzeuge. Ni...

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.