Park, Linda Sue.
Summary: The shaow of a man in black has followed 14-year-old Amy Cahill and her younger brother, Dan, on their worldwide search for 39 Clues that lead to a great power. Amy and Dan know the man in black has tried to kill them. They know he is a Madrigal, a member of the most secretive and terrifyng group hunting for the Clues. Amy and Dan have run hard and fast, but they can't escape the man...
Format: text
Publisher / Publication Date: Scholastic 2010