Sandra Harmon Books

In this dark, jagged true crime thriller, wily mob head Gregory Scarpa Sr. (alias the "Grim Reaper") secretly steals and kills under FBI protection for decades. When faced with arrest for his own c...

Staying Married . . . And Loving It

By Patricia Allen, Sandra Harmon

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Elvis and Me

By Priscilla Presley, Sandra Harmon

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Happy Teachers Day

By Sandra Harmon

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Mafia Son

By Sandra Harmon

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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.