Michael Holgate Books

The Man They Could Not Hang

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"John 'Babbacombe" Lee was one of the most notorious criminal figures of Victorian England. Convicted of the brutal murder of his elderly employer, he was condemned to hang but miraculously survive...

Night Of The Indigo

By Michael Holgate

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Marassa, a 15 year old Jamaican boy is catapulted into a wondrous world of Natural Mysticism. His twin brother Wico is dying. Guided by Kundo, the mystic warrior, Marassa transcends time and matter...

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.