Harris Gregory Fiction Writer Books

The Endicott evil

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In Victorian London, there exists no greater investigative team than master sleuth Colin Pendragon and his loyal partner, Ethan Pruitt. But it will take all their powers of deduction to determine i...

Dalwich desecration

By Harris Gregory Fiction Writer

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At the request of his father, master sleuth Colin Pendragon and his trusted partner, Ethan Pruitt, leave their familiar cosmopolitan London for rural Sussex County, travelling to the town of Dalwic...

The Framingham Fiend

By Gregory Harris

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Of all the ghastly crimes in Victorian London, none are as infamous—or unsolvable—as those of Jack the Ripper . . .   The murder scene is chillingly familiar. A young prostitute ha...

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.