Keith S. Folse Books

Focus On Grammar 5: An Integrated Skills Approach, Teacher'S Manual

By Carol A. Chapelle, Jay Maurer, Susan Lanzano, Keith S. Folse, Joan Jamieson, Rachel Spack Kock

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with A Fresh New Design And A Host Of Updated Exercises And Activities, The Popular focus On Grammar Series Is More Practical And Accessible Than Ever. Known For Its Focus On English Grammar Throug...

Focus On Grammar Workbook, 5: An Integrated Skills Approach, 3rd Edition

By Carol A. Chapelle, Rachel Spack Koch, Jay Maurer, Susan Lanzano, Keith S. Folse, Joan Jamieson, Rachel Spack Kock

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Focus on Grammar: An Advanced Course for Reference and Practice

By Keith S. Folse, Rachel Spack Koch

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Focus on Grammar

By Keith S. Folse, Rachel Spack Koch

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Focus on Grammar

By Keith S. Folse, Rachel Spack Koch

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Great Writing 5

By Tison Pugh, Keith S. Folse

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Great Paragraphs

By Keith S. Folse, E. Vestri Solomon, A. Muchmore Vokoun

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Great essays

By Keith S. Folse

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Targeting Listening and Speaking

By Keith S. Folse, Darren Bologna

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Targeting Listening and Speaking

By Keith S. Folse, Darren Bologna

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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.