Yes, the story does not make sense if you skip books or read books out of order. Did you know they're making 40 books, the last one by J.K. Rowling. the first 39 are the 39 clues, and the last is the finale?
Read the books. Collect the cards. Play the game.
You have to buy them, but some of the books are on Kindle.
Read the books.
go read the books.
you have to read all the books of th3 39 clues which you can buy in schoolastic or other places, but the cheat code is P4G4MPNNXP
the boy in the 39 clues books is called Dan cahill and the girl is called Amy Chaill
only 39 clues... hence no 41st clue
You have to play all the missions and get all the books and the card packs
Buying Books
There are 11 original books in "The 39 Clues" series that are possible to get in hardback. These books are written by various authors and follow the story of two siblings in a worldwide hunt for 39 clues that will determine the family's power and fortune.
You must have all 39 clues in order to continue with the final mission. You can get these "clues" by playing the missions in the 39 clues website, buying the books and entering the code in the cards you got, and buying a card pack; Example:P4G4MPNNXP. Sorry but even I haven't done it.
I played that game. You have to solve the clues online. But if you want the hand held card. You have to go and buy the 39 clues books. There should be 10 books.