Magic Tree House #9: Diving With Dolphins

After taking a break from their trips in the tree house, Jack and Annie are delighted to find that it’s back! Morgan le Fay needs their help – but they’ll have to become Master Librarians first, and that means solving four tricky riddles. For the first one, Morgan sends them deep into the middle of the ocean. Jack and Annie ride in an amazing mini-sub, meeting jellyfish, sea horses and an octopus! But there are some very scary sharks down there. Will a troupe of friendly dolphins come to the rescue…?