Holly Keller Books

You're Aboard Spaceship Earth

By Patricia Lauber

Average: 0.00, 0 Ratings

What a Hat!

By Holly Keller

Average: 0.00, 0 Ratings

Henry makes fun of his cousin Newton for always wearing his hat, but the hat comes in handy for Henry's sister Wizzie.

Pearl's New Skates

By Holly Keller

Average: 0.00, 0 Ratings

Pearl's birthday skates have a single blade and learning to use them is harder than she expects.

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.