Laurie Friedman Books

Mallory's journal of her fourth-grade trip to Washington D.C. reveals how much fun she has, despite a loose tooth, being upset with her best friend, Mary Ann, and getting separated from her class i...

Happy New Year Mallory

By Laurie B. Friedman

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When a bad stomachache sends Mallory to the hospital during a winter reunion with neighbor Mary Ann and their summer camp bunkmates, she is sad that her friends seem to be having great fun without...

Mallory in the spotlight

By Laurie B. Friedman

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When Mallory gets the lead in the school play, she cannot understand why her best friend Mary Ann is not just as excited as she is, but eventually she finds out--and learns who her real friends are.

Mallorys Guide to Boys Brothers Dads and Dogs Mallory Library

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Mallory on Board Mallory

By Laurie Friedman

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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.