Karl Pillemer Ph.D. Books

30 Lessons for Living

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“Heartfelt and ever-endearing—equal parts information and inspiration. This is a book to keep by your bedside and return to often.”—Amy Dickinson, nationally syndicated advice columnist "Ask Amy"Mo...

Fault Lines

By Karl Pillemer Ph.D.

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30 lessons for loving

By Karl A. Pillemer

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"Karl Pillemer asked hundreds of extraordinary men and women to share their hard-earned wisdom about love and what it takes to build a lasting, happy marriage. It is not only the largest study of i...

30 Lessons for Loving

By Karl Pillemer Ph.D.

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From the author of the beloved 30 Lessons for LivingReaders of Karl Pillemer’s first book cherished the sage advice and great stories shared by extraordinary older Americans. Now, Pillemer returns...

30 lessons for living

By Karl A. Pillemer

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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.