Derek Fridolfs Books

Injustice Gang and the Deadly Nightshade Justice League

By Derek Fridolfs

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Clarence

By Derek Fridolfs

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Camping with the rest of the Rough Riders Scouts, Clarence and his friends discover a journal that details exactly where a pirate buried his treasure years ago, but the journal also describes a chi...

Clarence. Getting Gilben

By Derek Fridolfs

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It s just another movie night at the local drive-in theater when Clarence witnesses his classmate, Gilben, get taken by something he just can t explain. With the help of his best friends, Jeff and...

Adventure time comics

By Kevin Jay Stanton, Mariko Tamaki, Rachel Dukes, Riley Rossmo, Kelsey Wroten, Eva Eskelinen, Zack Sterling, Shaenon Garrity, Ryan Browne, Kiki Ssh, Derek Fridolfs, Kyla Vanderklugt, Whitney Taylor, Fran Krause, Marina Julia, Annie Mok, Roger Langridge

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These sweet shorts come in many shapes and sizes, featuring all of the beloved characters from the Land of Ooo, written and illustrated by acclaimed cartoonists and storytellers from all over the w...

Teenage Mutant Ninja Turtles

By Kenny Byerly

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Teenage Mutant Ninja Turtles: New Animated Adventures Omnibus Volume 1

By Kenny Byerly

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Spinning straight out of the nit Nickelodeon cartoon, New Animated Adventures is an all-ages book that collects 16 stories perfect for fans old and new from issues #1–12 of the comic book ser...

Regular Show

By Molly Ostertag, Derek Fridolfs, Kevin Panetta

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Clarence OGN

By Derek Fridolfs

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Regular Show Ogn 4 Parks And Wreck

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Grumby Cat Omnibus

By McCool Ben McGraw Royal Serrano Elliott Fisher Ben Fridolfs Derek Kyriazis Ilias

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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.