David A. Adler Books

Cam Jansen: the Barking Treasure Mystery 19

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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...

Young Cam Jansen and the Substitute Mystery

By David A. Adler

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Cam and her classmates have a forgetful substitute teacher. First, heforgot the homework assignment. And where did he put his jacket? But when his car keys and cell phone go missing, everyone start...

Cam Jansen: Cam Jansen and the Valentine Baby Mystery 25

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 hospital. It's Valentine's Day, a...

Cam Jansen: Cam Jansen and the Summer Camp Mysteries

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 summer camp. Cam and her best friend,...

Young Cam Jansen and the Spotted Cat Mystery

By David A. Adler

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It?s a rainy day when Cam and her classmates arrive at school. Their classroom is neat and clean, but there is something there that does not belong. Meow! A cat with a spot on its tail is napping n...

Bones and the Big Yellow Mystery

By David A. Adler

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With his bag of detective tools in hand, Detective Jeffrey Bones can solve any mystery. Good thing, because Mr. Green has lost his school bus! Will Detective Bones be able to solve the case? Find o...

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.