The answer to the puzzle for card 91 in the 39 clues is "hope."
The answer is annecahill. Took me 10 mins to get that one.
Aloe. It is also one of the 39 Clues.
The answer is: dead aged face
The answer to The 39 Clues book 1 page puzzle is "Maggie Powers."
Anastasia lived
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aloe
belgrade
we see all
The answer to the Mad Scientist Clue in the 39 Clues series at the airport is "Einstein".
The answer to the puzzle in The 39 Clues book 3 is "Marie Curie."