Paul Scharff Books

Two Kings

By Gustavo Minacci, Paul Scharff

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Murder in McHenry

By Paul Scharff, Keith Bettinger

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A Kid s Guide to Philadelphia

By Ellen W. Leroe

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Take a trip through the birthplace of America, and learn fascinating facts that bring the history and splendor of Philadelphia to life. Whether it's world-class museums, public sculptures, or histo...

Fun At Bedtime

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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.