Peter Lerangis
Rick Riordan
He wrote a few as he wrote Percy Jackson series, and that Tres Navarre series, and the 39 clues and a beginning a book call Red Pyramid
Rick Riordan only wrote the first 39 Clues book.
many authors ************** A different author for each book. Please specify which book you mean.
The eighth book in The 39 clues series is 'The Emperor's Code.'
Patrick Carman wrote The Black Circle, the 5th book in the 1st 39 Clues series.
Shaka Zulu.
The 39 Clues, Book 3: The Sword Thief was written by Peter Lerangis, a well-known author who has also written the Spy X series and the Drama Club series. Lerangis has also written the 7th book of The 39 Clues (The Viper's Nest) and the 3rd book of the second series, Cahills vs. Vespers (The Dead of Night).
The title of the seventh 39 clues book is The Viper's Nest. My agent Code is P2J34GKXXP on the 39 clues website.
book six in the 39 clues book is: In Too Deep, by Jude Watson
February 2, 2010
Rosa and the secret princess is the seventh book.