David A. Adler Books

Cam Jansen and the basketball mystery

By David A. Adler

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When a special autographed basketball is stolen, Cam Jansen uses her photographic memory to identify the thief.

Young Cam Jansen and the circus mystery

By David A. Adler

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When Aunt Molly takes Cam and her friend Eric to the circus, their box of caramel popcorn mysteriously disappears.

Bones and the football mystery

By David A. Adler

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When Grandpa's lucky hat goes missing during a college football game, detective Jeffrey Bones and his friend Sally help look for it.

Cam Jansen and the graduation day mystery

By David A. Adler

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Cam Jansen and her photographic memory help her friend's grandfather retrieve his missing bag with an important graduation gift in it.

Cam Jansen and the millionaire mystery

By David A. Adler

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Using her excellent memory, Cam Jansen, aided by her friend Eric, investigates the disappearance of Mrs. Scott's valuable pearl necklace during a charity brunch.

Young Cam Jansen and the goldfish mystery

By David A. Adler

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"Cam Jansen must use her photographic memory to find two missing goldfish."-- Cam Jansen must use her photographic memory to find two missing goldfish. Book #19

Don t throw it to Mo

By David A. Adler

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Mo is the youngest kid on the Robins, his football team. His classmates don t mind, but the kids on their rival team tease him for being a butterfingers who s too tiny to catch the ball. Fortunat...

Young Cam Jansen and the speedy car mystery

By David A. Adler

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Cam Jansen uses her photographic memory at the school Green Fair to solve a mystery involving a missing electric car.

Cam Jansen and the green school mystery

By David A. Adler

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On Green Day, Cam and her classmates discuss ways to protect the environment, but when money collected for the school's new skylights disappears, Cam uses her photographic memory to solve the mystery.

Lou Gehrig

By David A. 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.