Robert Geiss Books

Kochen Mit Den Geissens

By Carmen Geiss, Robert Geiss

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Von Nix Kommt Nix

By Carmen Geiss, Andreas Hock, Robert Geiss

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Von Nix Kommt Nix

By Carmen Geiss, Andreas Hock, Robert Geiss, Carmen Geiss, Robert Geiss, Andreas Hock

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Sei Nicht Dumm, Werd Reich! Die Geissens Haben Es Geschafft – Ein Penthouse In Monaco, Eine Villa In St. Tropez, Ein Bentley, Eine Yacht, Gucci, Versace & Co. Millionen Verfolgen Seit 2011 Das Lebe...

Nearing Midnight

By Robert Geiss

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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.