Melissa Marr Books

One Blood Ruby

By Melissa Marr

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Undaunted: Knights in Black Leather

By Ronnie Douglas, Melissa Marr

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Following in the tradition of Kristen Ashley, Joanna Wilde, and Jay Crownover, this first novel in a sexy, dark New Adult series tells the thrilling story of a young woman who finds herself drawn t...

The Hidden Dragon

By Melissa Marr

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A sea-faring girl and her friends take on pirates and grown-ups, and bond with dragons, as they work to make the world a better place, in this spellbinding fantasy by New York Times bestselling aut...

The Hidden Knife

By Melissa Marr

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“Unique and gripping.”—Tamora Pierce New York Times bestselling author Melissa Marr invites readers into a magical world where stone gargoyles live among humans, ferocious wa...

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.