Kjartan Poskitt Books

Runaway Pea Washed Away

By Alex Willmore, Kjartan Poskitt

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Runaway Pea Washed Away

By Alex Willmore, Kjartan Poskitt

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Everyday math tricks for grown ups

By Kjartan Poskitt

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"MATH PROBLEMS MADE EASY: Written with lively text and simple examples, this book will illustrate all the basics--addition, subtraction, multiplication, and division--and advanced topics such as ra...

Codes

By Ian Baker, Kjartan Poskitt

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Codes

By Ian Baker, Kjartan Poskitt

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Escape from Hotel Infinity Numbers

By Amit Tayal, Igor Wolski, Sachin Nagar, Kjartan Poskitt

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Island of Tomorrow Geometry

By Sam Ledoyen, Igor Wolski, Jonathan Litton, Kjartan Poskitt

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Attack on Circuit City Statistics

By Igor Wolski, Catherine Casey, Kjartan Poskitt, Cory Godbey

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Lost in the Fourth Dimension Measurement

By Sam Ledoyen, Igor Wolski, Jonathan Litton, Kjartan Poskitt

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Harry Houdini the First Names Series

By Kjartan Poskitt, Geraint Ford

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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.