Mary Pope Osborne





Find Authors

Blizzard of the Blue Moon

by Mary Pope Osborne, Sal Murdocca (Illustrator)

In this exciting new Merlin Mission, Jack and Annie go back in time to New York City, during one of the darkest periods in the city's history--the Great Depression. Even worse, the city is in the grip of a terrible snowstorm. To stop the blizzard, Jack and Annie must save the unicorn made famous in the Cloister's medieval tapestries. But will that be enough to help a city that faces so many troubles?


Selected Works

Coming Soon
Eve of the Emperor Penguin
Jack AND Annie continue their quest for the secrets of happiness—secrets they need to save Merlin.
My Recent Books
Dark Day in the Deep Sea
When the magic tree house leads Jack and Annie to a tiny deserted island in the middle of the ocean, they’re not sure who needs help more–Merlin or themselves!
Sea Monsters: A Nonfiction Companion to Dark Day in the Deep Sea
How are an octopus and a squid different? What kinds of creatures live in the deepest abyss of the ocean?
Monday with a Mad Genius
Jack AND Annie are on a mission to save Merlin from his sorrows!
Dragon of the Red Dawn
Merlin the Magician will not eat or sleep or speak to anyone in Camelot. What can be done? The enchantress Morgan knows who to ask for help: young Jack and Annie of Frog Creek, Pennsylvania!
Tsunamis and Other Natural Disasters
What are the warning signs that a tsunami is on the way?
Blizzard of the Blue Moon
In this exciting new Merlin Mission, Jack and Annie go back in time to New York City, during one of the darkest periods in the city's history--the Great Depression.
Night of the New Magicians
Merlin sends Jack and Annie on a mysterious mission to Paris, France, over a 100 years ago.
Pompeii: Lost & Found
Learn about life in Pompeii and the volcano that put an end to this great civilization. Beautifully illustrated by Bonnie Christensen
Pilgrims
Fun facts about the first Thanksgiving and the people who celebrated it! Co-written by Natalie Boyce.
Carnival at Candlelight
In this Magic Tree House Merlin Mission, Jack and Annie travel to Venice!
Tales from the Odyssey
A retelling of the adventures of the Greek hero Odysseus in six chapter books for young readers.
Retellings
Sleeping Bobby
A familiar fairy tale with a funny twist.
Spider Kane Mysteries
Spider Kane and the Mystery Under the May Apple
Spider Kane uses his detective skills to unmask a mysterious moth.
Spider Kane and the Mystery at Jumbo Nightcrawler's
Spider Kane finds himself in another tough situation.
The Magic Tree House Research Guides
Sabertooths and the Ice Age
Jack and Annie discover amazing facts about the Ice Age