'A MASTERPIECE.' Stav Sherez, author of _The Intrusions_ 'A THRILLING RIDE.' _Irish Times_ 1950S MANHATTAN: the CIA carries out a covert study of psychoactive drugs. Ad man Ned Sweeney is dosed with MDT-48, and finds his horizons dramatically expand. . . Sixty years later, all that Ray Sweeney knows of his grandfather's life is that he committed suicide. But then Ray meets a retired government official, who claims he can illuminate the truth behind Ned's death. BOTH A SEQUEL AND A PREQUEL TO _THE DARK FIELDS_, WHICH WAS ADAPTED INTO THE HIT MOVIE _LIMITLESS_, _UNDER THE NIGHT _EXPLORES THE SEDUCTIVE POWER AND DANGERS OF UNLOCKING THE HUMAN MIND.