Series

The 39 Clues: The Cahill Files

by Clifford Riley

5 books in reading order

  1. #1 Operation Trinity Clifford Riley · 2012
  2. #2 The Submarine Job Clifford Riley · 2012
  3. #3 The Redcoat Chase Clifford Riley · 2012
  4. #4 The Houdini Escape Clifford Riley · 2012
  5. #5 Silent Night Clifford Riley · 2012
1 box set and collections
  1. Spymasters Clifford Riley · 2013