Philip Geer Ed.M. Books

Barron s CLEP

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This updated manual offers two full-length sample exams in the following test areas: College Composition and College Composition Modular, Humanities, Mathematics, Natural Sciences, and Social Scien...

Barron s GRE verbal workbook

By Philip Geer

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"Carefully focused reviews explain and demonstrate the GRE's verbal question types and help you achieve a high score. More than 380 example questions with answers provide intensive practice and rev...

Essential words for the GRE

By Philip Geer

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Presents lists of advanced vocabulary words to be studied for the Graduate Record Examination, with definitions, examples of how the words are used, a pretest and posttest, and a special section on...

Barrons 6 Sat Practice Tests

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Picture These SAT Words in a Flash

By Philip Geer Ed.M., Susan Geer

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Simon s Saga for the SAT

By Philip Geer, Philip Geer Ed.M.

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Barron s 6 Practice Tests for the Sat

By Philip Geer, Stephen A. Reiss

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iv, 534 pages : 28 cm

Picture These SAT Words

By Philip Geer, Susan Geer

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GRE Essential Words

By Philip Geer

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6 SAT Practice Tests Online Practice

By Philip Geer, Stephen A. Reiss

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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.