Upon what mystery is the novel, Before I Say Good-bye, based?

The mystery revolves around a cabin cruiser that was purposely blown up in New York Harbor, apparently killing four business associates, but the answer to the mystery lies in the criminal activities of New York's construction and psychic industries. Drawing from articles in the New York Times on the graft and fraud in the construction industry, Clark fictionalizes the bid-rigging and bribery among architectural firms, building contractors, and real-estate developers as a springboard for murder. ESP is also at the heart of this murder mystery.