Betty Travis Books

CLEP® Precalculus

By Mel H. Friedman, Betty Travis, Betty Travis PhD, Betty Travis, Mel H. Friedman

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Earn College Credit with REA's Test Prep for CLEP Precalculus Everything you need to pass the exam and get the college credit you deserve. REA leads the way in helping students pass their College B...

Best Test Prep CLEP Precalculus with CD ROM REA

By Betty Travis, Mel H. Friedman

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Mathematics Assessment Sampler Grades 9 12

By Betty Travis

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Mathematics Assessment Sampler Prekindergarten Grade 2

By Deann Huinker

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Clep Precalculus

By Betty Travis

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CLEP Precalculus

By Betty Travis

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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.