It's sink or swinrnfor Jack and Annie when the Magic Tree House whisks them off to the middle of the ocean. Luckily, they find a mini-submarine on a coral reef. Unluckily, they are about to meet a giant octopus and one very hungry shark. Will the dolphins save the day? Or are Jack and Annie doomed to be dinner?
Captain Blackpatch has bought a pirate truck to take the pirates on a camping holiday. Once there he becomes convinced that treasure is buried on a small island.
That's what Jack and Annie hear when the Magic Tree House whisk them back to the time of the American Civil War. There they meer a famus nurse named Clara Barton and do their best to help wounded soldiers. It is their hardest joueney in time yet- and the one that will make the most difference to their own lives!