Valerie Porr Books

New Hope for People with Borderline Personality Disorder

By Neil R. Bockian Ph.D. With Valerie Porr M.A., Nora Elizabeth Villagran M.A.

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Discover Exciting New Treatments for Borderline Personality DisorderNow you can overcome the symptoms of borderline personality disorder (BPD) and develop a more positive outlook on life, starting...

Overcoming Borderline Personality Disorder Lib E

By Donna Postel, Valerie Porr, Linda A Dimeff

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Overcoming Borderline Personality Disorder: A Family Guide for Healing and Change

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When Someone You Love Has Borderline Personality Disorder

By Marsha M. Linehan, Valerie Porr

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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.