David A. Adler Books

Cam Jansen and the catnapping mystery

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While visiting Aunt Molly at a fancy downtown hotel, Cam uses her photographic memory to help one of the guests find her stolen luggage and pet cat, and to catch the thief.

Young Cam Jansen and the Baseball Mystery

By David A. Adler

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Level Three Cam is playing baseball with her friends. When a baseball goes missing, Cam has to use her amazing memory to help her friends find it.

Cam Jansen and the barking treasure mystery

By David A. Adler

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When a woman's poodle disappears during a boat ride around the city, Cam uses her photographic memory to solve the mystery.

Young Cam Jansen and the Pizza Shop Mystery

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At a pizza parlor, Cam Jansen's jacket disappears. Could someone have taken it? Where could it be? Find out when Cam's amazing memory clicks into action in the sixth book of the Young Cam Jansen se...

Cam Jan Mystery of the Dinosaur Bones Babe Ruth Baseball Flip Cam Jansen

By David A. Adler

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Cam Jansen and the Birthday Mystery

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Cam Jansen: the Mystery of the Stolen Diamonds 1

By David A. Adler

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No mystery is too great for super-sleuth Cam Jansen and her amazing photographic memory! Can Cam help catch the diamond thief? Cam and her friend Eric are sitting at the mall when the jewelry store...

Cam Jansen: the Mystery of the Dinosaur Bones 3

By David A. Adler

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No mystery is too great for super-sleuth Cam Jansen and her amazing photographic memory!Mysteries follow super-sleuth Cam Jansen everywhere she goes...even to the museum. Cam and her class are on a...

Cam Jansen: The Mystery of the Television Dog 4

By David A. Adler

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No mystery is too great for super-sleuth Cam Jansen and her amazing photographic memory! Mysteries follow super-sleuth Cam Jansen everywhere she goes...even to a book signing. Cam is waiting in lin...

Cam Jansen: the Mystery of the Gold Coins 5

By David A. Adler

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The Cam Jansen books are perfect for young readers who are making the transition to chapter books, and Cam is a spunky young heroine whom readers have loved for over two decades. Now the first ten...

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.