Robert Papp Books

Quake!

By By Gail Langer Karwoski Illustrated By Robert Papp

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A boy and his dog navigate dangerous rubble, prejudices, and survival in this riveting fictional account of the San Francisco Earthquake of 1906.It's before daybreak in San Francisco on April 18, 1...

The scarlet stockings spy

By Trinka Hakes Noble

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In 1777 Philadelphia, young Maddy Rose spies for General Washington's army by using an unusual code to communicate with her soldier brother.

The last brother

By Trinka Hakes Noble

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Eleven-year-old Gabe enlists in the Union Army in Pennsylvania along with his older brother Davy and, as bugler, does his best to protect Davy during the Battle of Gettysburg.

P Is for Princess

By Steven Layne, Deborah Layne, Robert Papp, Lisa Papp

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Anjou-kori okleveltar

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Anjou-kori okleveltar

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Anjou-kori okleveltar

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Anjou-kori okleveltar

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Anjou-kori okleveltar

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Anjou-kori okleveltar

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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.