The 39 Clues Series (11 books)

There are 11 primary works and 14 total works in the The 39 Clues Series

The 39 Clues books feature 14-year-old Amy Cahill and her younger brother Dan on a quest to discover the secret behind their family's power.

The first 10 books follows the Clue Hunt.
The 11th transitions to the spin-off series.
Two companion novels just add depth to the series.

This Series Currently Has 5 Spin Off Series:
*The 39 Clues: Cahills vs. Vespers
*The 39 Clues: Rapid Fire
*The 39 Clues: The Cahill Files
*The 39 Clues: Unstoppable
The 39 Clues: Doublecross


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Other Series by Rick Riordan

Camp Half-Blood Chronicles (1 - 10 of 15 books)
  • The Lightning Thief (Percy Jackson and the Olympians, #1)
  • The Sea of Monsters (Percy Jackson and the Olympians, #2)
  • The Titan's Curse (Percy Jackson and the Olympians, #3)
  • The Battle of the Labyrinth (Percy Jackson and the Olympians, #4)
  • The Last Olympian (Percy Jackson and the Olympians, #5)
  • The Lost Hero (The Heroes of Olympus, #1)
  • The Son of Neptune (The Heroes of Olympus, #2)
  • The Mark of Athena (The Heroes of Olympus, #3)
  • The House of Hades (The Heroes of Olympus, #4)
  • The Blood of Olympus (The Heroes of Olympus, #5)
Percy Jackson and the Olympians (5 books)
  • The Lightning Thief (Percy Jackson and the Olympians, #1)
  • The Sea of Monsters (Percy Jackson and the Olympians, #2)
  • The Titan's Curse (Percy Jackson and the Olympians, #3)
  • The Battle of the Labyrinth (Percy Jackson and the Olympians, #4)
  • The Last Olympian (Percy Jackson and the Olympians, #5)
The Heroes of Olympus (5 books)
  • The Lost Hero (The Heroes of Olympus, #1)
  • The Son of Neptune (The Heroes of Olympus, #2)
  • The Mark of Athena (The Heroes of Olympus, #3)
  • The House of Hades (The Heroes of Olympus, #4)
  • The Blood of Olympus (The Heroes of Olympus, #5)
Kane Chronicles (3 books)
  • The Red Pyramid (Kane Chronicles, #1)
  • The Throne of Fire (Kane Chronicles, #2)
  • The Serpent's Shadow (Kane Chronicles, #3)
Magnus Chase and the Gods of Asgard (3 books)
  • The Sword of Summer (Magnus Chase and the Gods of Asgard, #1)
  • The Hammer of Thor (Magnus Chase and the Gods of Asgard, #2)
  • The Ship of the Dead (Magnus Chase and the Gods of Asgard, #3)