11 books in series
The 39 Clues
The 39 Clues is a 11-book series with 11 released primary works first released in 4 with contributions by Rick Riordan, Gordon Korman, Peter Lerangis, Jude Watson, Patrick Carman, Linda Sue Park, and Mallory Kass.
| #1 |  The Maze of Bones
| 3.47 | 131 reads | ||
| #2 |  One False Note
| 3.28 | 70 reads | ||
| #3 |  The Sword Thief
| 3.26 | 66 reads | ||
| #4 |  Beyond the Grave
| 3.44 | 59 reads | ||
| #5 |  The Black Circle
| 3.46 | 60 reads | ||
| #6 |  The 39 Clues: In Too Deep
| 3.37 | 55 reads | ||
| #7 |  The Viper's Nest
| 3.34 | 51 reads | ||
| #8 |  The Emperor's Code
| 3.43 | 52 reads | ||
| #9 |  Storm Warning
| 4 | 7 reads | ||
| #11 |  Vespers Rising
| 3.57 | 44 reads | ||
 The Black Book of Buried Secrets
| 3.4 | 7 reads |