Jeff Mack Books

Good news bad news

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While on a picnic, Bunny and Mouse see everything that happens to them from opposite points of view--Bunny sees only the good, while Mouse sees only the bad.

Mr. Monkey visits a school

By Jeff Mack

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Mr. Monkey has spent ages learning tricks and getting ready to visit the school. But first, he has to find it, and with Mr. Monkey, anything is possible.

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.

Jeff Mack Books

Mine

Ah Ha

Ah Ha

Ah Ha

Good News Bad News

Good News Bad News

Good News Bad News

Good news bad news

Mr. Monkey visits a school

Mr. Monkey Visits a School

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How to Convert ISBN-10 to ISBN-13 (and Vice Versa): A Complete Guide

What is an EAN and How Does it Relate to an ISBN?