. . . . "The danger quotient"@en . "The danger quotient" . . . . . "Fiction"@en . "A super-genius in a small underground colony of survivors of nuclear war, eighteen-year-old Casey risks journeying back to the twentieth century to discover why the survivors are dying and how he can save them all."@en . "A super-genius in a small underground colony of survivors of nuclear war, eighteen-year-old Casey risks journeying back to the twentieth century to discover why the survivors are dying and how he can save them all." . "Fiction" . . . . . . . .