The Winking Ruby Mystery

"Save Carlo . . . winking ruby . . . hurry!" This plea uttered by Gino, a mysterious violinist, just before he lapses into a coma, launch Jean and Louise Dana on their first exciting adventure in Europe. Is the mysterious "ruby" a gem, a girl, or part of a secret code?" The Danas must find out—and fast—because a life is at stake. Danger stalks the young detectives from the moment they board the Balaska with their Uncle Ned, captain of the ocean liner. Crossing the Atlantic they meet Enrico and Lena Dotti, professional hypnotists, who offer to help in solving the puzzle. Jean wants to accept,…