P23HRFXFXP enter this in your cards to get the 75th clue
P23HRFXFXP enter this in your cards to get your clue box
Enter this in your cards to get the 3rd clue P23HRFXFXP
They organize the 39 clues cards by card numbers.
P23HRFXFXP type this code in your cards to unlock a clue
The way to find out clues, is by collecting the proper cards that are listed for that clue. You can do that or you can enter a book code, to find a book clue.
There are 6 clue cards in the first book of The 39 Clues series. Each card reveals an important clue or hint as part of the overarching mystery explored in the series.
Type this P23HRFXFXP in your cards to unlock 3 clues. Real and reusable.
You collect the cards from the card combo "The Founding Fathers". The clue is honey.
you can buy cards or you can replicate them by using replicators
Online, the second clue in the 39 clues is hydrogen. But in the second book of the 39 clues is tungsten
only 39 clues... hence no 41st clue