Cynthia Johnson Books

McGraw-Hill's New York City SHSAT

By Cynthia Johnson

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500 ACT Science Questions to Know by Test Day

By Anaxos Inc

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We want you to succeed on the Science section of the ACT. That's why we've selected these 500 questions to help you study more effectively, use your preparation time wisely, and get your best score...

McGraw-Hill's 500 SAT Critical Reading Questions to Know by Test Day

By Cynthia Johnson

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Mcgraw-hill's Sat Math: 500 Questions to Know by Test Day

By Jerimi Ann Walker

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McGraw-Hill's 500 SAT math questions to know by test day

By Jerimi Ann Walker

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The Princeton Review word smart junior II

By Cynthia Brantley, Cynthia Johnson

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An introduction to 650 words students should know by the time they enter high school. Uses stories to present words in context and has quizzes for reinforcement.

Word smart junior

By C.L. Brantley, Cynthia Johnson

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An introduction to 650 words students should know by the time they enter high school. Uses stories to present words in context and has quizzes for reinforcement.

Word Smart Junior II 2nd Edition Smart Juniors Grades 6 to 8

By C.L. Brantley

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Writing Smart Junior 2nd Edition Smart Juniors Grades 6 to 8

By C.L. Brantley

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Platform

By Cynthia Johnson

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The indispensable guide to developing a personal brand, building an audience, and nurturing followers, by digital marketing thought-leader Cynthia Johnson. In the modern world, influence is every...

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.