"It's as if James Bond met Nancy Drew met Harriet the Spy. . . . Three cheers for a determinedly wholesome mystery series that doesn't talk down to its audience." -- Booklist

This time, it's an adventure on the wide-open ocean, and everyone's favorite girl detective, Ruby Redfort, is out at sea. Can she crack the case of the Twinford pirates while evading the clutches of a vile sea monster as well as the evil Count von Viscount? Well, you wouldn't want to bet against her