Michelle Knudsen Books

Will it finally be curtains for the demonic Mr. Gabriel in this climactic chapter of the Evil Librarian series?After sending the evil librarian, Mr. Gabriel, back to the demon world once and for al...

Chat Peau

By Golden

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The Case of Vampire Vivian

By Michelle Knudsen Illustrated By Amy Wummer

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Solve kid-sized dilemmas and mysteries with SCIENCE SOLVES IT! These fun science books for kids ages 5–8 blend clever stories with real-life science. Why did the dog turn green? Can you contr...

A slimy story

By Michelle Knudsen

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When Dan accidentally brings an earthworm to school, he gets a homework assignment that helps him solve a nagging problem--what to give his mother for her birthday.

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.