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Morgan le Fay will make Jack and Annie masters of the tree house if only they can solve four riddles. "Dolphins at Daybreak" begins the third set of four books in the magical series, as Jack and Annie embark upon solving riddle number three in a whole new world under the ocean!

B is for bandit...

Will Traveling Bear make the tennis team? Not until he has a match with a better player, listens to his coach, and turns a losing attitude into a winning one!

Jack and Annie of Frog Creek, Pennsylvania, know they have to find one of the four secrets of happiness to help save Merlin the magician. But when the magic tree house whisks them off to a misty island in the middle of nowhere, they wonder how they will find anything. As the fog lifts, they see a huge three-masted ship - could it be a pirate ship?