The westling game

I like the book called the westling game it's about a mystery and a race to get the inherance of a person who died the westing's. They either can work together to succeed and win the money but share it or they can choose to sabotage other peope to win. In it they had a word of the wiser because a old wisen man told them helpful information to use in their mystery finding who the killer was and what happened.