Clifford Riley

• Spymasters
• The 39 Clues
• Operation Trinity
• Silent Night (the 39 Clues: Cahill Files)
• A Misstep in Time
• A Village Blacksmith
• The 39 Clues: Rapid Fire 1: Legacy
• The 39 Clues: Rapid Fire 3: Hunted
• The 39 Clues: Rapid Fire 6: Invasion
• The 39 Clues: The Cahill Files #1: Operation Trinity
• The 39 Clues: The Cahill Files: Spymasters
• Crushed (The 39 Clues: Rapid Fire, #4)