Willard F. Jr. Harley Books

His needs her needs

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"In this classic bestseller Willard F. Harley, Jr., identifies the ten most vital needs of men and women and shows husbands and wives how to satisfy those needs in their spouses. He provides guidan...

His needs, her needs

By Willard F. Harley

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He wins she wins

By Willard F. Harley

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A guide for couples who seek a happier marriage by learning how to make joint decisions and resolve conflicts with enthusiastic agreement.

He wins, she wins

By Willard F. Harley

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A guide for couples who seek a happier marriage by learning how to make joint decisions and resolve conflicts with enthusiastic agreement.

Love busters

By Willard F. Harley

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Lo que el necesita lo que ella necesita

By Willard F.Jr. Harley

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His Needs Her Needs

By Willard F. Jr Harley

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His Needs Her Needs

By Willard F.Jr. Harley

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Buyers Renters and Freeloaders Audio

By Willard F. Jr. Harley

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Fall in Love Stay in Love

By Willard F. Jr. Harley

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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.