Sullivan Tom Books

If You Could See What I See

By D. Gill, Sullivan Tom

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If You Could See What I See

By D. Gill, Sullivan Tom

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Meals She Eats

By Tom, Rachael Sullivan

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New York Times BestsellerA first of its kind, functional lifestyle guide for PCOS, complete with personal stories and nourishing recipesYou’ve been diagnosed with or suspect polycystic ovary...

Alive Day

By Sullivan Tom, Betty White

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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.