Hall John Books

Reducing industrial oil costs
Reducing industrial oil costs

By Hall John

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Questions of the day
Questions of the day

By Hall John

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Sheffield University theses relating to Yorkshire and Derbyshire, 1920-1970
The Ardagh emeralds
The Ardagh emeralds

By Hall John

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England in the 1890s. The world of Victoria and the Empire. This is the world, too, of AJ Raffles, man about town, who, assisted by his inept assistant Bunny Manders, is a successful jewel thief. T...

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Death of a collector
Death of a collector

By Hall John

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That bloody woman
That bloody woman

By Hall John

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Sherlock Holmes at the Raffles Hotel
Moths
Moths

By Hall John

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Call of the Holy
Five forgotten stories
Five forgotten stories

By Hall John

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"In the winter of 1934-1935, according to H.P. Lovecraft's THE HAUNTER OF THE DARK, Robert Blake had settled down alone, to work ... He had painted 'nameless, unhuman monsters', and 'profoundly ali...

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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.

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