Bob Obee Books

CPE 1 PRACTICE TEST ALUMNO
CPE 1 PRACTICE TEST ALUMNO

By Obee

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Entry Tests Practice Tests for the Revised CPE 1
Entry Tests Practice Tests for the Revised CPE 1
Practice Tests for the Revised CPE 1
Practice Tests for the Revised CPE 2
UPSTREAM UPPER INT. WB REV.ED
UPSTREAM UPPER INT. WB REV.ED

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Mission IELTS 1 Academic
Mission IELTS 1 Academic

By Bob Obee

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•theme-based units from a wide variety of authentic sources •innovative unit structure dovetailing language, skills and exam preparation work •lexical exercises practising and...

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Mission IELTS
Mission IELTS

By Bob Obee

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Mission IELTS 1 General Training Supplement aims to help students achieve their potential for success in the IELTS General Training Module. This book can be used either as a stand alone short cours...

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First Certificate Direct Student s Book
First Certificate Direct Teacher s Book

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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.

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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