Mara Rockliff Books

A fun and inspiring picture book biography of tennis legend and women's rights activist Billie Jean King.From award-winning author Mara Rockliff and New York Times-bestselling illustrator Elizabeth...

Next to an Ant

By Mara Rockliff

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Get Real

By Mara Rockliff

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Get real

By Mara Rockliff

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A consumer guide for tweens provides insight into a range of topics from truth about fast-food nutrition to the environmental costs of cheap products, and shares related counsel on how to make info...

Me and Momma and Big John

By Mara Rockliff

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Little John is proud of his mother's work as a stonecutter for a cathedral called "Big John," but struggles to understand the importance of spending so much time on one stone that no one will know...

Girl Who Could Fix Anything

By Daniel Duncan, Mara Rockliff

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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.