David A. Adler Books

Young Cam Jansen and the Zoo Note Mystery

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Cam and Eric's class is going on a field trip to the zoo. But Eric can't find his permission slip, and without it, he can't go on the field trip. Where did it go? Did he drop it somewhere? Was it s...

Cam Jansen: the Mystery at the Haunted House 13

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 an amusement park. Cam, Eric, and Cam...

Cam Jansen: the Chocolate Fudge Mystery 14

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 while selling candy door-to-door. Cam an...

Cam Jansen: the Scary Snake Mystery 17

By David A. Adler

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The Cam Jansen series is perfect for young readers who are making the transition to chapter books. The first fifteen books in the series have received updated covers, and the series redesign contin...

Cam Jansen: the Catnapping Mystery 18

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 hotel. Cam is visiting her aunt Mol...

Cam Jansen: the Barking Treasure Mystery 19

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 on a boat ride. Cam and Eric are enjoyin...

Cam Jansen: the First Day of School Mystery 22

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 school. It's the first day of fifth g...

Young Cam Jansen and the New Girl Mystery

By David A. Adler

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There's a new girl in school! Her name is Jenny and she is makingfast friends with Cam and Eric. They're happy to help her find her way around, but when it's time for gym class, Jenny disappears. W...

Cam Jansen: the Birthday Mystery 20

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 party. Cam has put together a surpr...

Cam Jansen: the Snowy Day Mystery 24

By David A. Adler

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After nearly a quarter of a century, Cam Jansen remains a popular character, garnering new fans with each new title. In this newest Cam Jansen mystery, it's a very snowy day outside, so Cam and Eri...

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.