Michelle Knudsen Books

Noah's Ark

By Christopher Santoro, Michelle Knudsen

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Lift 30 fun flaps to find all kinds of hidden details in Noah's ark! This board book is the perfect holiday gift for babies and toddlers, and a classic addition to any family’s library. Childre...

Moldy Mystery Social Studies Connects

By Michelle Knudsen

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Happy Halloween

By Michelle Knudsen, Rusty Fletcher

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Caso de Vivian la Vampira the Case of Vampire Vivian

By Amy Wummer, Michelle Knudsen

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Princess of Trelian

By Michelle Knudsen

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Evil Librarian

By Michelle Knudsen

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Mage of Trelian

By Michelle Knudsen

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Revenge of the Evil Librarian

By Michelle Knudsen

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The stage is set for a fiendishly dramatic summer at theater camp for Cynthia and her boyfriend, Ryan. With no demons at all. Right?Last fall, Cynthia Rothschild saved her best friend, as well as t...

Princess of Trelian

By Michelle Knudsen

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Evil Librarian

By Michelle Knudsen

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He’s young. He’s hot. He’s also evil. He’s . . . the librarian.When Cynthia Rothschild’s best friend, Annie, falls head over heels for the new high-school librarian, C...

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.