many people.
in each book they use a different author
Patrick Carman wrote The Black Circle, the 5th book in the 1st 39 Clues series.
The eighth book in The 39 clues series is 'The Emperor's Code.'
there are 4 card packs in the 39 clues series.
The 39 Clues really isn't a mystery series. It's more of an adventure/peril series.
There is not going to be a 12th 39 Clues book, but there is going to be a new 39 Clues series. The first book in the new series is called The Medusa Plot by Gordon Korman.
No, the series is fictional.
Yes, it's a popular series!
In the 39 clues Aunt Beatrices house is in Boston
silk
I'm not sure... but heres a code for a 39 Clues card code: P2C2RD4PXP
The answer to the Mad Scientist Clue in the 39 Clues series at the airport is "Einstein".
The answer is: dead aged face