Double-cross : Book 6

How to become an Undercover Pirate...1) Have a pirate captain as your ancient ancestor2) Find a message in a bottle and a magic gold doubloon3) Get whisked back in time to join a pirate crew4) 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?