Clifford Riley

Clifford Riley has risked his life numerous times to write about the mysterious Cahill family. His location is currently unknown.

Ebooks

Operation Trinity (The 39 Clues: The Cahill Files, Book 1)

Spymasters (The 39 Clues: The Cahill Files)

Silent Night (The 39 Clues: Cahill Files)

Fireworks (The 39 Clues: Rapid Fire, Book 7)

Hunted (The 39 Clues: Rapid Fire, Book 3)

Legacy (The 39 Clues: Rapid Fire, Book 1)

Ignition (The 39 Clues: Rapid Fire, Book 2)

Crushed (The 39 Clues: Rapid Fire, Book 4)

Turbulence (The 39 Clues: Rapid Fire, Book 5)

Invasion (The 39 Clues: Rapid Fire, Book 6)

The 39 Clues: Midnight Ride

The Submarine Job (The 39 Clues: The Cahill Files, Book 2)

The Redcoat Chase (The 39 Clues: The Cahill Files, Book 3)

The Houdini Escape (The 39 Clues: The Cahill Files, Book 4)