Who wins the hunt for the 39 clues?

Amy and Dan DO win! They are trapped in the Madrigal stronghold with Isabel Kabra, she has a gun and she threathens to shoot them if they don't give her all the clues, the ingredients to the 39th clue, the serum. But Amy, Dan, Alistair, Hamilton,Ian, and the Sinead and Ned Starling, manage to overcome Isabel, everybody gives Amy and Dan their clues, what the gave Isabel because Amy destroys the serum by bashing it on Isabels head in order to save Dan. So they do win and reunite the family!