Dirk Zeller Books

If you're looking to rev up your real estate business, find the best lead targets, or just refine specific skills, this guide has it covered. Zeller shows you all the tricks of the trade, including...

Successful time management for dummies

By Dirk Zeller

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Zeller shows you how effective time management can help change your work day-- and your life. He gives you practical tips on managing distractions, fighting procrastination, and optimizing your wor...

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.