This is a project for determining which branch of the Cahill family you are. If you do not know the truth about the Madrigals, you might get a surprise if you turn out to be one. You learn the secret in the end of the ninth book. If any of you are curious, I am part of Ekatrina.
I do not take credit for the 39 clues series, it is written by the list of authors: Rick Riordan Gordon Korman Peter Lerangis Jude Watson Patrick Karman Linda Sue Park Margaret Peterson Haddix
