Trina Robbins Books

"What can we learn about human psychology from a superhero who is mentally healthy? This compendium of 20 essays offers a fascinating analysis of the psychology behind one of the world's most famou...

A midterm night's scheme

By Trina Robbins

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Help! Just before the science fair, a set of magic potions disappear from Luna's locker! The Chicagoland Detective Agency takes up the young witch's case. If Raf, Megan, and Raf's talking dog Bradl...

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.