The Medusa Plot
Gordon Korman
The 39 Clues: Cahills vs. Vespers (1)
Flashpoint (The 39 Clues: Unstoppable, Book 4)
The 39 Clue: Unstoppable (4)
The Emperor's Code (The 39 Clues, Book 8)
The 39 Clues (8)
Vespers Rising (The 39 Clues, Book 11)
Rick Riordan & Peter Lerangis & Jude Watson & Gordon Korman
The 39 Clues (11)