Robert Q. Gray Books

The Labour Aristocracy in Victorian Edinburgh

By Robert Q. Gray

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The aristocracy of labour in nineteenth-century Britain, c.1850-1900

By Robert Q. Gray, Robert Gray

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The Factory Question and Industrial England, 1830-1860

By Robert Gray, Robert Q. Gray

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The factory question and industrial England, 1830-1860 addresses the continuing controversy over industrialisation. It investigates different perceptions of the 'factory system' either as a threat...

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.