Regina Calcaterra Books

Calcaterra and her siblings endured a series of foster homes and intermittent homelessness in the shadow of the Hamptons. She managed to rise above her past while fighting to keep her brother and t...

Etched in Sand

By Regina Calcaterra

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Girl Unbroken: A Sister's Harrowing Story of Survival from the Streets of Long Island to the Farms of Idaho

By Regina Calcaterra

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"They were five kids with five different fathers and an alcoholic mother who left them to fend for themselves for weeks at a time. Yet through it all they had each other. Rosie, the youngest, is fa...

Girl Unbroken

By Regina Calcaterra, Rosie Maloney

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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.