Originally released in 2016, The 39 Clues Superspecial: Outbreak is an awesome fitting end to the long-running 39 Clues franchise. Written by C. Alexander London, the young-adult adventure book is the one and only volume in the Superspecial series. However, it is also widely referred as an additional 5th book in the prequel series, The 39 Clues: Doublecross.
The 39 Clues: Doublecross Series is the 4th story arc in the 39 Clues Franchise, sequel to Unstoppable Series. It features 4 exciting adventure books for young adult readers, published between 2015 and 2016. The books are written by four different authors and among them, only Jude Watson has previously written books in the series. For the other three authors (C. Alexander London, Jenny Goebel, and Sarwat Chadda), their books are their first in the 39 Clues series.
Mission Atomic is the 4th book that delivers a thrilling end for The 39 Clues: Doublecross series. Originally released in 2016, the young-adult adventure book is written by Sarwat Chadda.
Originally released in January 2016, Mission Hurricane is a fantastic young-adult novel. Written by Jenny Goebel, it is the 3rd book in the bestselling adventure series The 39 Clues: Doublecross.
Mission Hindenburg is a thrilling adventure novel written by C. Alexander London. First released in 2015, it is the 2nd book in The 39 Clues: Doublecross series, the fourth story arc in The 39 Clues franchise.
The 39 Clues: Doublecross is the 4th story arc in the 39 Clues franchise, sequel to Unstoppable. The young-adult series starts brilliantly with the first adventure novel Mission Titanic. The book is written by Jude Watson and first published in 2015.