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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.

BooksCollections
Vespers Rising
#11
Vespers Rising
ByRick Riordan,Peter Lerangis,+2 more

4 • 22 Readers • 238 pages • 3.8

The Black Book of Buried Secrets
The Black Book of Buried Secrets
ByMallory Kass,Rick Riordan(Introduction)

2010 • 4 Readers • 189 pages • 5