Marissa Walsh Books

Andie has just finished eighth grade and will be starting high school in the fall. The good news: Her super-popular valedictorian big sister, Claire, is graduating and won't be there to put Andie i...

A Field Guide to High School

By Marissa Walsh

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A field guide to high school

By Marissa Walsh

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Andie and her best friend Bess read through a manual Andie's Yale-bound sister wrote for her, which is filled with tips and tricks for excelling at Plumstead Country Day high school where Andie is...

Does this book make me look fat

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Girl with Glasses

By Marissa Walsh

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Marissa Walsh traces her long history of life as a girl with glasses, describing each pair she has ever owned and what they have taught her about life, fashion, and self-esteem.

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.