Tungsten.
Online, the second clue in the 39 clues is hydrogen. But in the second book of the 39 clues is tungsten
The Second Clue in the 39 clues is Hydrogen.Location: The Border of France and Switzerland - CERNBranch: Ekaterina
only 39 clues... hence no 41st clue
Type this P23HRFXFXP in your cards to unlock 3 clues. Real and reusable.
The clue is iron salute in book 1 of The 39 Clues.
there is no page clue in 39 clues book 9
There's only 39 clues!!
Sorry there is no code that gives you every clue in the 39 clues add me to your allies:P2749NM7XP
The answer to the Mad Scientist Clue in the 39 Clues series at the airport is "Einstein".
There isn't 180 clues.
Pepper, a Madrigal clue.
there is no clue there is a puzzle