The serum formula.
Well actually, book 12 doesn't have any clues. It's a Cahill vs Vesper book which means that you don't get any clues. Books 1-10 are clue books though.
there is no such a book called "i don't have a clue" and when there is no book then no one could posebly write it!
It would ruin the books if told you all. Dan and Amy only find 10 of the 39 clues and the big 39th clue. Here are some: Book 1: A Visle Book 2: tungsten Book 3: gold book 4: myrh book 5: amber book 6: The clue they fnd is water but Irina Spasksy kew of anohter clue being a rosemary Book 7: Aloe and the Tomas clue is diamond book 10: there is a clue that i will not say but the 39th clue they find is a serum to make you all 5 branches. Each of the 38 clues is an ingredent to the serum. Look, This is helpful, but wrong. I know they find all of them. I've only read up to seven, wroking on eight, but still, It would ruin the series if they don't find them all. Sor-ry! :'( Just saying.
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
The fourth clue comes with the cards in the second book. But for that matter, how do you open the fifth clue!!?? One clue comes from an ultra-rare card called "x-ray", the other clue comes from the book.
important deatels in ur book ect. or like info leading to the answer or main clue of book or ect.
they dont find clue 2 untill book 2
Silk
there is no second clue in book 1. It's the first book but the clue is iron solute
No but it is about to be.