Joanne Rocklin Books

Just add fun!

By Joanne Rocklin

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Hank and Frank must count, add, and multiply to figure out the right amount of food for their party.

Case Of The Missing Birthday Party: Hello Math

By Joanne Rocklin

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Liz the Whiz & Co. help a neighbor find her way to a birthday party by using their knowledge of place value.

For your eyes only!

By Joanne Rocklin

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The entries in the journals of two sixth grade students reveal much about their personal feelings, family lives, and a growing interest in poetry sparked by their new substitute teacher.

One Hungry Cat

By Joanne Rocklin

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Tom the cat tries to evenly divide the snacks he has baked for himself and two friends, but after gobbling up a few treats, Tom is faced with a new division problem. Includes division activities.

How Much Is That Guinea Pig in the Window

By Joanne Rocklin

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The Case of the Missing Birthday Party Hello Reader Series

By Joanne Rocklin

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One Hungry Cat

By Rowan Barnes Murphy, Joanne Rocklin

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The Case of the Shrunken Allowance

By Cornelius Van Wright, Joanne Rocklin, Ying Hwa Hu

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For Your Eyes Only

By Joanne Rocklin

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This Book Is Haunted An I Can Read Book

By Joanne Rocklin

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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.