The deadly trap: sam silver: undercover pirate 4

How to become an Undercover Pirate... 1) Have a pirate captain as your ancient ancestor 2) Find a message in a bottle and a magic gold doubloon 3) Get whisked back in time to join a pirate crew 4) When you get home DON'T TELL ANYONE. Remember - you're undercover! There's a new pirate aboard the Sea Wolf and he's popular with the crew, but Sam is suspicious - why is the new recruit so interested in Captain Blade? And how can Sam convince his friends that they're falling into a deadly trap?