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... [More...]

Jack and Annie are off on another Merlin Mission. This time, Merlin has sent them to rescue a beautiful magical creature—the unicorn. But when they land in New York City during the Depression of the 1930s, Jack and Annie are confused. Where will they... [More...]

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... [More...]

JACK AND ANNIE are on a mission to save Merlin from his sorrows! Charged with finding the second of four secrets of happiness, the brother-and-sister team travel back in the magic tree house to the period known as the Renaissance. This time, Jack and Annie... [More...]