Outbreak (The 39 Clues)

CALLING ALL CAHILLS! Announcing a 39 Clues Superspecial adventure -- the gang is back, and called to investigate one of their own: Sinead Starling.

• Mission Atomic (The 39 Clues: Doublecross Book 4)
• The 39 Clues: Doublecross Book 1: Mission Titanic
• Mission Hurricane (The 39 Clues: Doublecross, Book 3)
• Mission Hindenburg (The 39 Clues: Doublecross, Book 2)
• The 39 Clues: Unstoppable Book 4: Flashpoint
• The 39 Clues: Unstoppable Book 3: Countdown
• The 39 Clues: Unstoppable Book 2: Breakaway
• The 39 Clues: The Black Book of Buried Secrets
• Operation Trinity (39 Clues: The Cahill Files, Book 1)
• The 39 Clues: The Cahill Files: Spymasters