Mark Hoffmann Books

Fruit Bowl

Average: 0.00, 0 Ratings

Who belongs in the fruit bowl? Apples, check. Blueberries, check. Tomato, che-- Wait, what?! Tomato wants to join the other fruits, but does he belong? The perfect mix of botany and a bunch of bana...

Fruit Bowl

By Mark Hoffmann

Average: 0.00, 0 Ratings

Dirt Cheap

By Mark Hoffmann

Average: 0.00, 0 Ratings

A young entrepreneur sets out to earn some money and discovers the value of a dollar (and of dirt)! Perfect for fans of Lemonade in Winter, The Most Magnificent Thing, and Rosie Revere, Engineer.Bi...

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.