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 to a Spider Queen, from mystical selkies to a magical sword, this is a Magic Tree House adventure kids won’t want to miss!
"I'm one of those very lucky people who absolutely loves what they do for a living. There is no career better suited to my eccentricities, strengths, and passions than that of a children's book author."--Mary Pope Osborne
Mary Pope Osborne is the author of the popular Magic Tree House series. She works with her husband Will and her sister Natalie on the nonfiction companion series, Magic Tree House Research Guides. Many of her books have been named to best-books lists.





