John Patrick Green Books

Nothing but trouble

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It's all fun and games when Phineas and Ferb create a swimming pool full of gelatin...until Dr. Doofenshmirtz's latest creation brings it to life! Phineas and Ferb have to find a way to stop the g...

Hippopotamister

By John Patrick Green

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Kitten Construction Company

By John Patrick Green

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InvestiGators

By John Patrick Green

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Nothing but trouble

By John Green

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It's all fun and games when Phineas and Ferb create a swimming pool full of gelatin...until Dr. Doofenshmirtz's latest creation brings it to life! Phineas and Ferb have to find a way to stop the g...

When Phineas and Ferb take a time machine twenty years into the future, they meet a grown-up Candace, still determined to get them in trouble, who goes back into the past to stop them, as Perry the...

Phineas and Ferb Comic Reader

By Disney

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InvestiGators

By John Patrick Green

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Els InvestiGators 1 Agents amb moltes dents

By John Patrick Green

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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.