Kathryn Harkup Books

A is for arsenic

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Investigates the poisons Christie employs in fourteen of her mysteries, discussing why the poisons kill, how they interact, obtainability of such poisons, and which cases may have inspired Christie...

Making the monster

By Kathryn Harkup

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Death By Shakespeare

By Kathryn Harkup

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A is for Arsenic

By Kathryn Harkup, Beth Chalmers

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Is for Arsenic

By Kathryn Harkup

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A Is for Arsenic

By Kathryn Harkup

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A is for arsenic

By Kathryn Harkup

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Making the Monster

By Kathryn Harkup

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Making the Monster

By Kathryn Harkup

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Making the Monster

By Kathryn Harkup

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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.