Holly Parker Books

If We're Together, Why Do I Feel So Alone?

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Harvard University lecturer and clinical psychologist Dr. Holly Parker offers a step-by-step guide for coping with emotionally unavailable partners. Living with an emotionally absent partner can...

Allison and the Billionaire a Tale of Domination and Submission

By Holly Parker

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When Reality Bites

By Victor La Cerva, Holly Parker

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Balanced Wealth

By Tom Hine, Holly Parker

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Back on the Market

By Laura Morton, Holly Parker

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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.