Water
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.
The clue is iron salute in book 1 of The 39 Clues.
there is no page clue in 39 clues book 9
Online, the second clue in the 39 clues is hydrogen. But in the second book of the 39 clues is tungsten
The ninth clue is Mace
The clue is Iron Solute.
mhyr
water.
Aloe.
39. Each book has 1 clue.
silver.
only 39 clues... hence no 41st clue