Royden Lepp Books

Rust Vol. 3 Death of the Rocket Boy

By Royden Lepp

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187 pages : 24 cm

Jurassic Jeff: Space Invader (Jurassic Jeff Book 1)

By Royden Lepp

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Dinosaurs, aliens, and world domination?! Introducing a graphic series about what it means to be a friend (and how to take over the world!)--perfect for fans of Cat Kid Comic Club, and Investigator...

Jurassic Jeff: Race to Warp Speed (Jurassic Jeff Book 2)

By Royden Lepp

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Jeff the alien is ready to take his dino-friends on a quest to find their missing family. . .that is if he can remember where he put his warp drive first. Embark on a hilarious adventure filled wit...

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.