In a novel that reaffirms her reputation as "America's Queen of Suspense," Mary Higgins Clark delivers a gripping tale of deception and tantalizing suspense. Nicholas Spencer, charismatic head of the medical research company Gen-stone, involved in the development of an anticancer vaccine, suddenly disappears. His private plane crashes en route to Puerto Rico, but his body is not found. Early results of the vaccine seemed highly promising. Yet, coinciding...