Dorothy Porter Books

The witch number

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In 1968, in the Blue Mountains of Australia, thirteen-year-old Shelley meets Leah, also thirteen, who lures her into a sinister world of witchcraft and danger.

Secret Friends

By Dorothy Porter Wesley

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The Monkey s Mask

By Dorothy Porter Wesley

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Patient s Progress

By Porter Dorothy

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The Codification of Medical Morality

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Patient's progress

By Porter Dorothy

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A Pocket in Time

By Dorothy Porter Wesley

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Alasdair Gray Chapman Magazine

By Joy Hendry

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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.