Deep-sea danger

"You have been summoned to Professor Fustigate's dusty study at the Ocean Explorers Museum. 300 years ago the pirate ship Shiver Me Timbers sank and the captain's logbook was found ashore. Ever since, explorers have tried to find the wreck. Just yesterday, Professor Fustigate discovered that if you can follow the coded clues found in the logbook, you will be lead to the wreck and its treasure"--Provided by publisher.