Robert Jeffrey Books

Glasgow Crimefighter

By Robert Jeffrey, Les Brown

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Gentle Johnny Ramensky

By Robert Jeffrey

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"Gentle Johnny Ramensky is the astonishing tale of a boy reared in the poverty of the Gorbals who became one of the world's most extraordinary safe blowers. He spent more than forty years in jail....

Barlinnie Story

By Robert Jeffrey

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Gentle Johnny Ramensky

By Robert Jeffrey

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Glasgow s Godfather

By Robert Jeffrey

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Blood on the Streets

By Robert Jeffrey

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Peterhead

By Robert Jeffrey

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Gangs of Glasgow

By Robert Jeffrey

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Real Hard Cases

By Robert Jeffrey, Les Brown

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Peterhead

By Robert Jeffrey

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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.