Douglas Pierce Books

McGraw-Hill's Conquering GMAT Verbal and Writing

By Douglas Pierce, Doug Pierce

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Cracking the TOEFL iBT with CD, 2013 Edition

By Douglas Pierce

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Offers drill questions, listening exercises, and a full-length simulated TOEFL exam. This edition features: Full-length simulated TOEFL iBT exam with accompanying audio sections on an MP3 CD; Core...

Cracking the TOEFL iBT with Audio CD, 2014 Edition

By Douglas Pierce

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Cracking the GRE with 4 Practice Tests, 2014 Edition

By Douglas Pierce

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Cracking the GRE with 6 Practice Tests & DVD, 2014 Edition

By Douglas Pierce

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Cracking the new GRE with DVD

By Douglas Pierce

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Presents a guide to assist with preparation for the new GRE, with practice questions pertaining to the verbal, math, and analytical writing sections; tips, techniques, and detailed explanations for...

Cracking the TOEFL iBT 2012

By Douglas Pierce

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Offers drill questions, listening exercises, and a full-length simulated TOEFL exam.

Cracking the TOEFL IBT with Audio CD

By Douglas Pierce, Princeton Review

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Cracking the TOEFL iBT

By Douglas Pierce, Princeton Review

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Cracking the TOEFL iBT with Audio CD

By Douglas Pierce, Princeton Review

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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.