The Shadow of the Man in Black has followed fourteen-year-old Amy Cahill and her younger brother, Dan, on their world wide search for the 39 Clues that lead them to a great power. Amy and Dan know the man in black has tried to kill them. They know he is a Madrigal, a memember of the most secretive and terrifying group hunting for the clues. And they know something else, a secret they would rather forget- their parents were Madrigals too. Amy and Dan have run fast and hard, but they can't escape the man following them. And now, in the wake of a terible tragedgy, he's ready to step out of the darkness for their final confrontation.