Sullivan George Books

Better Basketball for Girls

By George Sullivan

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Larry Csonka, power and pride

By George Sullivan

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A biography of the football superstar whose record performance in the Super Bowl game of 1974 made football history.

Charms and Spells Witches and Demons

By George Sullivan

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How the White House really works

By George Sullivan

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Provides a behind-the-scenes look at life in the official residence of the president of the United States, describing how the staff and facilities affect that key official's daily life.

Screen Play

By George Sullivan, Sullivan George

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Modern bombers and attack planes

By George Sullivan

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Unsolved II

By George Sullivan

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Mr. President

By George Sullivan

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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.