David Adler Books

CJ MYSTERY MONSTER MOVIE Cam Jansen

By David Adler

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EATON STANLEY AND THE MIND CONTROL EXPER Adler David a. Eaton Stanley Adventure.

By David Adler

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Cam Jansen and the mystery of the television dog

By David A. Adler

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Fifth grader Cam uses her photographic memory, with help from her friend Eric and his twin sisters, to solve the mystery of Poochie, a famous canine television star.

Cam Jansen and the Mystery of the Carnival Prize

By David Adler

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Young CAM Jansen and the Missi

By David Adler

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Fractions decimals and percents

By David A. Adler

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Fractions, decimals, and percents are everywhere! Just take a stroll around a county fair. There are fractions at the pie-eating contest, decimals in the arcade, and percent signs in the prize boot...

The Carsick Zebra and Other Animal Riddles

By David Adler

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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.