Ronald Mackin Books

A Basic English Grammar
A Basic English Grammar

By John Eastwood

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A Basic English Grammar: Exercises
A Basic English Grammar
Oxford Essential Dictionary, New Edition with CD-ROM
Oxford Essential Dictionary, New Edition with CD-ROM

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Oxford Essential Dictionary gives all the essential help and information elementary and pre-intermediate learners need. Updated with 200 NEW words, Oxford Essential Dictionary includes over 24,00...

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Higher Course of English Study: Bk. 1
Physics, Mathematics, Biology, Applied Science
OPEAC oral drills
OPEAC oral drills

By Ronald Mackin

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Short Course in Spoken English
Varieties of Spoken English
More Varieties of Spoken English

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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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