Robert L. Perry Books

Fifty Best Low Invest High Profit Franchise

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Now, the most popular guide to the best low-cost franchise opportunities available has been completely updated in a brand-new edition! The 50 Best Low-Investment, High-Profit Franchises is the idea...

The 50 Best Low-Investment, High-Profit Franchises

By Robert L. Perry, Perry, Robert L., Robert Laurance Perry, Perry, Robert Laurance

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xi, 293 p. ; 23 cm Includes bibliographical references (p. 288)

Owning Your Home Computer: The Complete Illustrated Guide

By Robert Louis Perry, Robert L. Perry, Perry, Robert L.

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"The Complete Illustrated Guide." Everest Books, NY, 224 p. 26 cm. ISBN 0-89696-112-5. Includes an appendix listing 1050 home computer programs (many are games), a bibliography of 19 books, 7 ma...

Encyclopedia Of Presidents And The First Ladies

By Unknown, Robert L. Perry

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City Shapes

By Robert L. Perry, Children'S Press

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It'S Science

By Robert L. Perry

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X-Ray Picture Books

By Robert L. Perry, Franklin Watts

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Computer Crime

By Robert Louis Perry, Robert L. Perry, Perry, Robert L.

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65 pages : 23 cm Examines legal and ethical problems involving computer use, including piracy of hardware and software and the theft of information and electronic funds Includes bibliographical ref...

Guide To Self-Employment

By Robert L. Perry, Perry, Robert L.

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Bibliography: p. 121-122 Includes index Discusses the advantages and disadvantages, and the risks and benefits of having your own business which is your primary source of income

Artificial Intelligence

By Robert Louis Perry, Robert L. Perry, Perry, Robert L.

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What is Artificial Intelligence? Learn the latest terminology and the history of AI -- from old-fashioned robots to the most current applications in games and software. Find out how AI affects your...

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.