Mary Pope Osborne Books

Night of the New Magicians

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The #1 bestselling chapter book series of all time celebrates 25 years with new covers and a new, easy-to-use numbering system! Merlin sends Jack and Annie on a mysterious mission to Paris, Fra...

The magic tree house carries Jack and Annie to New York City in 1938 on a mission to rescue the last unicorn. In this exciting new Merlin Mission, Jack and Annie go back in time to New York City, d...

Blizzard of the Blue Moon

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Magic. Mystery. Time-travel. Join Jack, Annie and the Magic Tree House as they travel to the past on a daring unicorn rescue mission--from the #1 bestselling chapter book series of all time! Jack...

Pilgrims

By Natalie Pope Boyce

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Learn the true story of Thanksgiving with the #1 bestselling chapter book series of all time, Magic Tree House! Track the facts with Jack and Annie in this nonfiction companion to Magic Tree...

Ancient Rome and Pompeii

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The #1 bestselling chapter book series of all time celebrates 25 years with new covers and a new, easy-to-use numbering system! Getting the facts behind the fiction has never looked better. T...

Polar Bears and the Arctic

By Natalie Pope Boyce

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The #1 bestselling chapter book series of all time celebrates 25 years with new covers and a new, easy-to-use numbering system! Getting the facts behind the fiction has never looked better. T...

Dragon of the red dawn

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When Merlin is weighed down by sorrows, Jack and Annie travel back to feudal Japan to learn one of the four secrets of happiness.

Dragon of the Red Dawn

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The #1 bestselling chapter book series of all time celebrates 25 years with new covers and a new, easy-to-use numbering system! Jack and Annie are headed to a land of fierce samurai and great b...

Monday with a mad genius

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Jack and Annie travel 500 years back in time to Florence, Italy, and spend a day helping Leonardo da Vinci in the hope of learning another secret of happiness.

Monday with a Mad Genius

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The #1 bestselling chapter book series of all time celebrates 25 years with new covers and a new, easy-to-use numbering system! Jack and Annie are on a mission to save Merlin from his sorrows!...

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.