Peter Lerangis.
book six in the 39 clues book is: In Too Deep, by Jude Watson
book 1 maze of bones
The answer for book three is "The competition is about hope"
Peter Lerangis
Rick Riordan
the author is Gordon Korman
The Sword Thief is the third book in The 39 Clues series.The fourth book is Beyond the Grave.
Patrick Carman wrote The Black Circle, the 5th book in the 1st 39 Clues series.
Rick Riordan only wrote the first 39 Clues book.
The name of the 10th 39 clues book is Into The Gauntlet.
there is no 49 clues book it is 39 clues
many authors ************** A different author for each book. Please specify which book you mean.