Matthew Holm Books

Rock Star

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Babymouse 18: Happy Birthday, Babymouse

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Meet Babymouse--the spunky mouse beloved by young readers for more than a decade! You’re all invited to Babymouse’s big birthday event—and we mean BIG! Will she have the most epic birthday ever? Th...

Babymouse 20: Babymouse Goes for the Gold

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Meet Babymouse—the spunky mouse beloved by young readers for more than a decade! Babymouse has joined the swim team! Even though she’s not always the best at sports, will her hard work earn her th...

Squish 5: Game On!

By Jennifer L. Holm

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Now an animated show streaming on HBO Max!It's SQUISH—a hilarious, action packed graphic novel series from the award-winning creators of Babymouse! Filled with superheroes, comics within comics,...

Game on!

By Jennifer L. Holm

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Squish the amoeba neglects his homework, parents, friends, and even his Super Amoeba comic books when he discovers the video game Mitosis.

Squish 5: Game On!

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Introducing Squish—a hilarious, action packed graphic novel series from the award-winning creators of Babymouse! Filled with superheroes, comics within comics, and gross-out science, Squish is...

Squish 6: Fear the Amoeba

By Jennifer L. Holm, Matthew Holm

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Now an animated show streaming on HBO Max!He’s ba-ack! From the award-winning creators of Babymouse, it’s the most spine-tingling* Squish yet! Gulp! A SCARY new movie has everyone talking—and Squ...

Squish Fear the Amoeba 6

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Deadly Disease of Doom

By Jennifer L. Holm, Matthew Holm

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Squish Deadly Disease of Doom 7

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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.