There are 27 books in the Magic Tree House Merlin Mission series. The newest book is Night of the Ninth Dragon which came out in 2016.

1
Christmas in Camelot

By Mary Pope Osborne , Sal Murdocca (illustrator) ,

Book cover of Christmas in Camelot
Magic. Mystery. Time-travel. This Christmas, travel to Camelot with Jack, Annie and The Magic Tree House in this holiday fantasy adventure from the #1 bestselling chapter book series of all time!

When Jack and Annie receive an invitation to spend Christmas Eve in Camelot-a magical place that exists only in…
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2
Haunted Castle on Hallows Eve

By Mary Pope Osborne , Sal Murdocca (illustrator) ,

Book cover of Haunted Castle on Hallows Eve
Make story time a little spookier with the #1 bestselling chapter book series of all time! Every visit to the magic tree house leads to a time-travel adventure!

Jack and Annie are summoned once again to the fantasy realm of Camelot. There, Merlin the Magician tells them that the Stone…

3
Summer of the Sea Serpent

By Mary Pope Osborne , Sal Murdocca (illustrator) ,

Book cover of Summer of the Sea Serpent
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 off on another mythical mission at the request of Merlin the magician. Luckily, they have a young sorcerer, Teddy, to help them. From underwater caves…

4
Winter of the Ice Wizard

By Mary Pope Osborne , Sal Murdocca (illustrator) ,

Book cover of Winter of the Ice Wizard
The #1 bestselling chapter book series of all time celebrates 25 years with new covers and a new, easy-to-use numbering system!

Merlin the magician and Morgan le Fay have disappeared, and in order to find them, Jack and Annie journey with their friends Teddy and Kathleen to the Land-Behind-the-Clouds, a…

5
Carnival at Candlelight

By Mary Pope Osborne , Sal Murdocca (illustrator) ,

Carnival at Candlelight
MERLIN HAS ASKED Jack and Annie to help on another Merlin Mission. This time they head back into history to Venice, Italy. With the help of a research book, a book of magic rhymes, and a set of mysterious instructions from Merlin, the heroes will save the beautiful city from…

6
Season of the Sandstorms

By Mary Pope Osborne , Sal Murdocca (illustrator) ,

Book cover of Season of the Sandstorms
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 travel back in time to a desert in the Middle East. There they meet a Bedouin tribe and learn about the way that they live. From…

7
Night of the New Magicians

By Mary Pope Osborne , Sal Murdocca (illustrator) ,

Book cover of Night of the New Magicians

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, France, over a 100 years ago. There they must find four magicians and give them an urgent message…

8
Blizzard of the Blue Moon

By Mary Pope Osborne , Sal Murdocca (illustrator) ,

Book cover of Blizzard of the Blue Moon
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 and Annie must rescue a beautiful magical creature—the unicorn. But when they land in New York City…

9
Dragon of the Red Dawn

By Mary Pope Osborne , Sal Murdocca (illustrator) ,

Book cover of Dragon of the Red Dawn

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 beauty, the capital city of Edo (now the city of Tokyo), in ancient Japan in the…

10
Monday with a Mad Genius

By Mary Pope Osborne , Sal Murdocca (illustrator) ,

Book cover of Monday with a Mad Genius
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! The brother-and-sister team travel back in the magic tree house to the period known as the…

11
Dark Day in the Deep Sea

By Mary Pope Osborne , Sal Murdocca (illustrator) ,

Book cover of Dark Day in the Deep Sea
Jack and Annie continue their quest for the secrets of happiness–secrets they need if they’re going to save Merlin. But when the magic tree house leads them to a tiny deserted island in the middle of the ocean, they’re not sure who needs help more–Merlin or themselves! The brother and…

12
Eve of the Emperor Penguin

By Mary Pope Osborne , Sal Murdocca (illustrator) ,

Book cover of Eve of the Emperor Penguin
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 arrive on the one continent they haven’t visited before: Antarctica! What can they hope to learn about happiness in such a barren place? Only the penguins…

13
Moonlight on the Magic Flute

By Mary Pope Osborne , Sal Murdocca (illustrator) ,

Book cover of Moonlight on the Magic Flute
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 head to 18th-century Austria, where they must find and help a musician by the name of Mozart. Decked out in the craziest outfits they’ve ever worn—including…

14
A Good Night for Ghosts

By Mary Pope Osborne , Sal Murdocca (illustrator) ,

Book cover of A Good Night for Ghosts
Make story time a little spookier with the #1 bestselling chapter book series of all time! Every visit to the magic tree house leads to a time-travel adventure!

Jack and Annie are on a mission to find—and inspire—a musician that brings happiness to millions of people. After traveling to New…

15
Leprechaun in Late Winter

By Mary Pope Osborne , Sal Murdocca (illustrator) ,

Book cover of Leprechaun in Late Winter
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 find (and inspire!) creative people. This time, Jack and Annie meet an Irish girl and go on a magical adventure that…

16
A Ghost Tale for Christmas Time

By Mary Pope Osborne , Sal Murdocca (illustrator) ,

Book cover of A Ghost Tale for Christmas Time
Jack and Annie must help the famous writer Charles Dickens! The brother and sister are whisked back in time to Victorian England and the foggy streets of London. There, Jack and Annie discover that Charles Dickens has been thrown in jail! How can they help him? They will need all…

17
A Crazy Day with Cobras

By Mary Pope Osborne , Sal Murdocca (illustrator) ,

Book cover of A Crazy Day with Cobras
The  Magic Tree House series is back, but with the magic tree house comes terrible news: Merlin’s beloved penguin, Penny, has been put under a spell! Jack and Annie must find four things to break the spell. The first is a rare and precious emerald. When the magic tree house…

18
Dogs in the Dead of Night

By Mary Pope Osborne , Sal Murdocca (illustrator) ,

Book cover of Dogs in the Dead of Night
Jack and Annie are ready for their next adventure in the New York Times bestselling middle-grade series—the Magic Tree House!

Beware of avalanches!

When the magic tree house whisks Jack and Annie back in time to the highest pass in the Swiss Alps, they discover an ancient monastery filled with…

19
Abe Lincoln at Last!

By Mary Pope Osborne , Sal Murdocca (illustrator) ,

Book cover of Abe Lincoln at Last!
Are you ready for a presidential adventure? Jack and Annie are! They are whisked back to Washington, D.C., in 1861. Jack can’t wait to meet Abraham Lincoln himself! But the new president is too busy to see them, as he is desperately trying to save a nation in crisis. It’s…

20
A Perfect Time for Pandas

By Mary Pope Osborne , Sal Murdocca (illustrator) ,

Book cover of A Perfect Time for Pandas
The #1 bestselling chapter book series of all time celebrates 25 years with new covers and a new, easy-to-use numbering system!

Time-traveling brother-and-sister team Jack and Annie have to find a certain kind of food. The magic tree house whisks them off to a village in the mountains of southeast…

21
Stallion by Starlight

By Mary Pope Osborne , Sal Murdocca (illustrator) ,

Book cover of Stallion by Starlight
The #1 bestselling chapter book series of all time celebrates 25 years with new covers and a new, easy-to-use numbering system!

Hold your horses! Jack and Annie must find four secrets of greatness for Merlin the magician. To start, they travel back in time to meet Alexander the Great. He…

22
Hurry Up, Houdini!

By Mary Pope Osborne , Sal Murdocca (illustrator) ,

Book cover of Hurry Up, Houdini!
The #1 bestselling chapter book series of all time celebrates 25 years with new covers and a new, easy-to-use numbering system!

Abracadabra! Jack and Annie are on a mission for Merlin the magician. They’re looking for a secret of greatness from the best escape artist that ever lived, Harry Houdini.…

23
High Time for Heroes

By Mary Pope Osborne , Sal Murdocca (illustrator) ,

Book cover of High Time for Heroes
Jack and Annie are on a mission for Merlin the magician! This time, the magic tree house whisks them off to Thebes, Egypt, to find Florence Nightingale, a world-famous nurse. But when they find her, the Florence Nightingale they meet is not a famous nurse at all—she’s not even a…

24
Soccer on Sunday

By Mary Pope Osborne , Sal Murdocca (illustrator) ,

Book cover of Soccer on Sunday
The #1 bestselling chapter book series of all time celebrates 25 years with new covers and a new, easy-to-use numbering system!

Goal! Jack and Annie have tickets to one of the most exciting soccer games ever—the 1970 World Cup! They are sure the famous soccer player Pelé will tell them…

25
Shadow of the Shark

By Mary Pope Osborne , Sal Murdocca (illustrator) ,

Book cover of Shadow of the Shark
The #1 bestselling chapter book series of all time celebrates 25 years with new covers and a new, easy-to-use numbering system!

It’s a dream vacation for Jack and Annie—or is it? When Teddy, a young sorcerer, offers to send Jack and Annie on a dream vacation, they can’t wait to…

26
Balto of the Blue Dawn

By Mary Pope Osborne , Sal Murdocca (illustrator) ,

Book cover of Balto of the Blue Dawn
The #1 bestselling chapter book series of all time celebrates 25 years with new covers and a new, easy-to-use numbering system!

The magic tree house has returned and it’s taking Jack and Annie back in time to Alaska, 1925. There they meet Balto, a jet-black Siberian husky destined to save…

27
Night of the Ninth Dragon

By Mary Pope Osborne , Sal Murdocca (illustrator) ,

Book cover of Night of the Ninth Dragon
Please come to Camelot. The magic tree house whisks Jack and Annie through space and time to find that the castle of Camelot has been attacked and King Arthur has been gravely wounded. To save the kingdom-and the king-Jack and Annie have only one day to solve a riddle that…