Leonard Felder Ph.D. Books

Making Peace with Your Parents

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“Making Peace with Your Parents is compassionate, well-written, and will be of great value to many.”—Leo BuscagliaNo matter how old you are and whether or not your parents are alive, you have to co...

The Ten Challenges: Spiritual Lessons from the Ten Commandments for Creating Meaning, Growth, and Ri chness Every Day of Your Life

By Leonard Felder Ph.D., Leonard Felder

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More Fully Alive

By Leonard Felder Ph.D.

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Fitting in is overrated

By Leonard Felder

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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.