Kevin J. O'Connell Books

Opening Preparation
Opening Preparation

By Assiac

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Instant Chess
Instant Chess

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Oxford Encyclopaedia of Chess Games: v. 1
Karpov's games as world champion 1975-1978
Spanish Ruy Lopez Open
Spanish Ruy Lopez Open

By Kevin Oconnell

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Games of Robert J Fischer Batsford Chess Book
The Batsford chess yearbook
The Batsford chess yearbook

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The Batsford chess yearbook
The Batsford chess yearbook

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Complete Games of World Champion Karpov
Bird s Opening
Bird s Opening

By K. J. O Connell

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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.

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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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