Bowl of Heaven

SF masters Gregory Benford and Larry Niven spin a tale of alien encounters and strange technologies on an epic scale In Bowl of Heaven , the first collaboration by science fiction authors Larry Niven ( Ringworld ) and Gregory Benford ( Timescape ), the limits of wonder are redrawn once again as a human expedition to another star system is jeopardized by an encounter with an astonishingly immense artifact in interstellar space: a bowl-shaped structure half-englobing a star, with a habitable area