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 sink or swim for Jack and Annie when the Magic Tree House whisks them off to the middle of the ocean. Luckily, they find a mini-submarine...
After 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 riddles. For the first one, Morgan sends them deep into the middle...
The Magic Tree House whisks Jack and Annie to the middle of the ocean where they find a mini-submarine and meet a giant octopus and one very hungry shark! Includes grey scale illustrations, book descriptions and an author profile.