Nancy Werlin Books

When two lonely teenagers, one the son of a widower rabbi and the other the sister of an autistic twin, are drawn together by a tragic accident, they discover they have more in common than they gue...

Locked inside

By Nancy Werlin

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After she is kidnapped from the exclusive boarding school she attends, heiress Marnie Skyedottir must rethink her idealized relationship with her mother, her own sense of who she is, and her relati...

The Killer s Cousin

By Nancy Werlin

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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.