David A. Adler Books

Cam Jansen: Cam Jansen and the Wedding Cake Mystery 30

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Cam Jansen and her friends are volunteering at a talent show at the local senior center. They're having fun entertaining the guests and enjoying treats donated by Ken's Bakeshop. But during the sho...

Cam Jansen and the Graduation Day Mystery 31

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The beloved elementary school sleuth Cam Jansen is back in her 31st mystery! Eric's father is finally graduating from college. But before the celebration can begin, a very special present from Gran...

Young Cam Jansen and the Goldfish Mystery

By David A. Adler, Susanna Natti

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Cam, her best friend, Eric, and her aunt Molly win two goldfish at the local fair. When the goldfish go missing, Cam must use her amazing photographic memory to solve the mystery.

Cam Jansen and the Millionaire Mystery

By David A. Adler

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Can Cam catch a jewel thief?Mysteries follow super-sleuth Cam Jansen everywhere she goes… even to a charity event. Cam and Eric are at a benefit with their mothers to raise money for local firefigh...

SCH Cam Jansen 4c bulk pack NA

By David A. Adler

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Young Cam Jansen and the Library Mystery

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When Cam Jansen, her father, and her friend Eric go to the library, Cam finds a mystery to read. But soon, she has a mystery to solve. Her father's shopping list has disappeared. Cam decides to use...

Cam Jansen and the School Play Mystery

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Cam Jansen: the Mystery of the U.F.O. 2

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 park with U.F.O.s in sight! Cam and...

Cam Jansen: the Mystery of the Circus Clown 7

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...

Cam Jansen: the Mystery of the Stolen Corn Popper 11

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 ten books in the series have received updated covers, bringing new life to these perenni...

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.