John Porell Books

Weird weather

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Did you know that it can really rain frogs? Or that there is such a thing as pink snow? And that there's a place on earth where it hasn't rained in 400 years? We're talking about some really weird...

Weird Weather The Real Deal Blue Plus

By John Porell

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When Things Go Wrong Real Deal Red Plus

By John Porell

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The Real Deal Red Plus

By John Porell, Gary Miller, Megan McGoldrick

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Amazing Journeys The Real Deal Blue Plus

By John Porell

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Ant and the Grasshopper

By John Porell, Heinle

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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.