Callaghan John Books

Socialism in Britain since 1884

By Callaghan John

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Socialism in Britain since 1884

By Callaghan John

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British communism

By Callaghan John

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Wide-ranging and richly researched, this is the first sourcebook to reconstruct the tumultuous history of the Communist Party of Great Britain. Drawing together over one hundred and fifty documents...

British communism

By Callaghan John

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Boycott, a cricketing legend

By Callaghan John

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Yorkshire's pride

By Callaghan John

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Boycott

By Callaghan John

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Great Power Complex

By Callaghan John

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Great power complex

By Callaghan John

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Rajani Palme Dutt

By Callaghan John

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Rajani Palme Dutt (1896-1974) was a leading figure in the Communist Party of Great Britain from the 1920s to the 1960s. His strong links with the Comintern made him, throughout this period, a devot...

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.