Storm Warning (The 39 Clues, Book 9)

In the gripping ninth installment of the #1 NY Times Bestselling series, fourteen-year-old Amy Cahill and her younger brother, Dan, face the ominous threat of a man in black relentlessly pursuing them in their quest for the 39 Clues. As they navigate a perilous journey filled with danger, the looming confrontation with this member of the secretive Madrigal group intensifies following a devastating tragedy. With their lives on the line, Amy and Dan must confront the darkness that shadows them in a thrilling climax.