Sam Silver Undercover Pirate 6: The Double-cross

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!

Captain Blade's old enemy, Blackheart, is out for revenge. With his ruthless crew he's determined to steal the Sea Wolf. Can Sam and the pirates outwit their deadly enemy?