Process of Elimination is a 1998 children's novel by Carolyn Keen. It is part of the Nancy Drew and Hardy Boys Supermystery series.
Nancy and Bess join many from all over the world to participate in a conference concerning the environment, but they soon pick up the murder of Carl Dubchek, a conference supervisor. Meanwhile, the Hardys witness the strange and unorthodox theft of multiple bamboo plants, and the connection it makes to the conference.
References
Process of Elimination Wikipedia(Text) CC BY-SA