12 books in series

The 39 Clues

The 39 Clues is a 12-book series with 11 primary works first released in 4 with contributions by Rick Riordan, Gordon Korman, and 6 others.

Vespers Rising
#11
Vespers Rising

4 • 30 Readers • 238 pages • 3.7

The Black Book of Buried Secrets
The Black Book of Buried Secrets

2010 • 7 Readers • 189 pages • 3