Philip Carona Books

Basic Science Skills
Basic Science Skills

By Philip Carona

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Things That Measure
Things That Measure

By Philip Carona

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Earth Through the Ages Dolphin Science Books
The junior true book of chemistry
Junior true book of numbers
Power Skills in Science- 1
Power Skills in Science- 1

By Philip Carona

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Numbers
Numbers

By Philip B. Carona

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Explains the development of our system of numbers, place value, and why numbers are used.

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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.

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