The answer is"arctic". After that, the code in the library is "boxes on beechey isle".
5910
luke1
It says "boxes on beechey island
Lemur Fight Luke1 Jane4 Death
LUKE1
Fight is the secret Tomas code.
FIGHT
death
FIGHT
There is no cheat in any mission in any 39 clues game!
arctic
ARCTIC
it is lisbon
FIGHT
jane4
Aloe
P3wkmfh2xp