Mary Pope Osborne Books

New York's Bravest

By Mary Pope Osborne

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Tells of the heroic deeds of the legendary New York firefighter, Mose Humphreys.

Summer of the Sea Serpent

By Mary Pope Osborne

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Jack and Annie travel in their magic tree house to the land of the mystical selkies to seek a magical sword for Merlin.

Winter of the Ice Wizard

By Mary Pope Osborne

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Jack and Annie are joined by Teddy and Kathleen as they travel to the snowy Land-Behind-the-Clouds, where they search for the eye of the Ice Wizard and attempt to help Merlin and Morgan.

Magic Tree House 34: Season of the Sandstorms

By Mary Pope Osborne

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Guided by a magic rhyme, Jack and Annie travel to ancient Baghdad on a mission to help the Caliph disseminate wisdom to the world.

Magic Tree House 33: Carnival at Candlelight

By Mary Pope Osborne

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While on a mission to prove to Merlin that they can use magic wisely, Jack and Annie travel to seventeenth-century Venice, Italy, to save the city from disaster.

Night of the New Magicians

By Mary Pope Osborne

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Jack and Annie visit the Paris World's Fair of 1889 in an effort to protect four scientific pioneers from an evil sorcerer.

Dinosaurs

By Mary Pope Osborne, Will Osborne

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Jack and Annie explain about all the different types of dinosaurs.

Knights and Castles: A Nonfiction Companion to Magic Tree House 2: The Knight at Dawn

By Mary Pope Osborne

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Mummies and Pyramids: A Nonfiction Companion to Magic Tree House 3: Mummies in the Morning

By Mary Pope Osborne, Will Osborne

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Good Morning, Gorillas

By Mary Pope Osborne

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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.